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how to minimize stringappending to one line in python

plist comprehensionp precodegtgtgt y a1 b1 a2 b2 gtgtgt i if i0 a else asi for i in y a1 ab1 a2 ab2 codepre pyour examplep precodegtgtgt y alligator pple banana gtgtgt i if i0 a else asi for i in y alligator apple abanana codepre

iterating through twos list of lists in python

precodefor i in rangelenl for j in range lena codepre pcodeicode and codejcode here are both of type codeintcode if you want them to be elements in codelcode and codeacode usep precodefor i in l for j in a codepre paccordingly changep precodenewlistappendli0 aj0 codepre ptop precodenewlistappendi0 j0 codepre pthe code runs now however the result is not expected which would need more workp

replacing an escaped single quote with an escaped double quote in python

ol lireplace all the into a magic wordli lireplace all the into li lireplace all the magic words back to li ol

python getting calling modules path via traceback problems

pto find the location of a module function or class use the codeinspectcode modulep precodeimport inspect printinspectgetsourcefilesomemodule codepre pyou can use this to find the location of the code units you are interested in if you put this in a library just wrap it in a function that takes an argument p pactually you could do the same with codefilecode if necessary just pass it as the argument to a function that will do the restp

is there a python equivalent of the prefuse visualization toolkit

pa hrefhttpmayavisourceforgenet relnofollowmayaviap

modwsgi reading posted file content remains empty

pokay heres the solutionp pi cant explain it but the file form fields get emptied on first read which i found out by accident maybe a bug who knows i assumed that they would stay intact like any other variable and can be read multiple timesp pwhat i ignored was that i had in fact addressed them several times so the solution was to first store the files content in a variable and then use that multiple timesp

typechecking in functions between python 27 and python 33

pfrom a hrefhttpdocspythonorg31whatsnew30htmlintegers relnofollowhttpdocspythonorg31whatsnew30htmlintegersap pthe sysmaxint constant was removed since there is no longer a limit to the value of integers however sysmaxsize can be used as an integer larger than any practical list or string index it conforms to the implementations natural integer size and is typically the same as sysmaxint in previous releases on the same platform assuming the same build optionsp precodeif not isinstancen int or n gt sysmaxsize raise typeerrorn must be int codepre pmay work for differentiating int and longp

why is scipysparselinalgeigsh giving the wrong answer

pwhile sorting by absolute values as suggested by hyry gives the same result for both tests it still is unsatisfying since the my underlying intent was to get the largest eigenvalues from my matrix for real symmetric matrices i thought codeeigshcode would return the largest eigenvalues it doesnt it returns the largest eigenvalues strongsorted by magnitudestrong p

use your own colour for plots with guiqwt in python

psure i dont see the problem in your code i dont know the guiqwt module but try using matplotlib a hrefhttpmatplotlibsourceforgenetapicolorsapihtml relnofollowhttpmatplotlibsourceforgenetapicolorsapihtmlap pyou can also try this color tablep precode from pyqt4 import qtcore qtgui red qtguiqcolor200 0 0 green qtguiqcolor0 200 0 blue qtguiqcolor0 0 200 black qtguiqcolor0 0 0 white qtguiqcolor255 255 255 0 codepre

getting dry with python conditionals and django returns

pi notice that your last return is conditional and guess based on my own similar code that if neither of the checks triggers you want to go on and return something else maybe not even a redirect p pheres how i think i would do itp precodedef checkformessage if status active and presult 0 return active message bla bla bla if status too many failures return failed foooobarrrrr if status deactivated by merchant return deactivated derpa derp return none msg checkformessage if msg messagesaddmessagerequest messageserror msg return httpresponseredirectreversebillingupdate go on and do some other stuff return directtotemplatesometemplatehtml some stuff codepre pnote that the function checkformessage is defined inside the view function so we dont have to pass everything involved in a test as a parameter to it in case the tets are many and varied if they just require a status and some p variable it can just as well be declared outside the view function and take those parametersp pthe main point is that the fall through alternative where we dont want to add any message at all can be handled by returning none in the check method and checking for the existence of a message in the view methodp

concurrent remote procedure calls to c object

pmaybe factors can affect the selectionp pone solution is to use fastcgip pclient sends http request to http server that has fastcgi enabled htp server dispatch the request to your rpc server via the fastcgi mechanism rpc server process and generates response and sends back to http server http server sends the response back to your clientp

open an ssh tunnel from heroku python app on the cedar stack

pthis recipe ought to work with python even though it was for a rails app heres the recipe a hrefhttpstackoverflowcoma27361295558639httpstackoverflowcoma27361295558639ap pthe biggest challenge is convincing ssh to not prompt when it starts upp

creating multiple objects of model using one button in django

pyou can use codebulkcreatecode method introduced in django 14 p precodeaccesscodeobjectsbulkcreateaccesscode for i in range100 codepre phowever there are some problems with this approach from django docp blockquote pthis has a number of caveats thoughp precode the models save method will not be called and the presave and postsave signals will not be sent it does not work with child models in a multitable inheritance scenario if the models primary key is an autofield it does not retrieve and set the primary key attribute as save does codepre blockquote pto add action to admin page please check a hrefhttpstackoverflowcoma149204852074398this answera with details how to do itp

how can remove a message specific of a file python

pinstead of redirecting the standard output of your process to a file by changing sysstdout you need to write your data to the file directly you can do it for example like thisp precodeprint gtgt logfile s resi codepre por like thisp precodelogfilewritestrresi codepre pthis will ensure that your file will not contain random unrelated data that happens to be printed to the standard outputp

printing values in multiple arrays coming out a jarbled mess

pit looks like you are trying to output json instead of building a string why not create a list of dictionaries and dump it to json via something like thisp precodeimport json list1 for x in rangei list1append name value print jsondumpslist1 indent4 codepre

python loop in parallel

pif you want to do things in parallel well you have to run them in parallel i think the reason why youre only seeing a 20 speed boost is because of the cost of creating and joining processes is quite high and chewing into the performance benefit you get from multiprocessing this degraded speed increase is to be expected since there is a cost associated with creating and joining processes try something more time consuming and youll notice the 20 rise to a more expected amountp palso if your bottleneck is the cpu isnt able to run multiple processes shouldnt really happen nowadays with the dualquad core cpus you might not even notice a speed boost since theyre still being run serially at the hardware levelp

how to read a tag from pn532 in python

pi did found a way that might be partially correct since eugenes answer does not provide a definitive way that we know will work it cannot be considered a full answer so i will most probably accept this one if nothing else changesp pfirst of all since the empn532em does not continuously monitor for signals and emits data we will have to program it the usual way in order for it to behave according to what we want to achievep pthis can be done using the same a hrefhttpwwwarduinoccenmainsoftware relnofollowsoftwarea that you program any other emarduinoem device p pmake sure you have chosen the correct port from the tools menu if you dont know which port is that in windows go to codestartgtall programsgtaccessoriesgtsystem toolsgtsystem informationgtcomponentsgtportsgtserialcode for linux going to codedevserialbyidcode should do p pthen i would recommend using the examples provided by the manufacturer a hrefhttpsgithubcomadafruitadafruitnfcshieldi2c relnofollowherea make sure you choose the right connection type or else you will see no data coming from the device most probably you will want i2cp ponce that is done and your device emits data each time a emtagem is used on it check with a serial terminal configured at 115200 baud rate then you are ready to start working with pythonp pagain i recommend a hrefhttppyserialsourceforgenet relnofollowthisa module to read your data from the serial port it even comes with a ready to use example of a emwxwidgetsem terminal to read your data from the empn532em if of curse you use another python library and you think its better do say so in the commentsp

where comes the output message when submitting a python file to spark using sparksubmit

pposting my answer here since i didnt find them elsewhere p pi first tried yarn logs applicationid applicationidxxxx was told that log aggregation has not completed or is not enabledp phere comes the steps to dig out the print messagep precode1 follow the link at the end of the execution http17231341249046proxyapplication14387240517970007a here reverse ssh and proxy needs to be setup 2 at the application overview page find out the appmaster node id ip17231416ec2internal9035 3 go back to aws emr cluster list find out the public dns for this id 4 ssh from the driver node into this appmaster node same keypair 5 cd varloghadoopuserlogsapplication14387963042150005container1438796304215000501000001 always choose the first container 6 cat stdout codepre pas you can see its very convoluted probably will be better off to write output into a file hosted in s3p

dynamically adding keyarguments to method

pfor the sake of closure i give the only solution that was found use codeexeccode proposed by strongmgilsonstrongp precodeimport os new class dynamickargsobject class that makes a run method with same arguments as those given to the constructor def initself kargs kargrepr joinstrkeyreprvalue for keyvalue in kargsiteritems exec def runself kargrepr kargsn return selfrun kargrepr kargs selfrun newinstancemethodrun self def runself kargs print kargs this can also be done with a function def runkargs print kargs def dynamickargskargs kargrepr joinstrkeyreprvalue for keyvalue in kargsiteritems exec def run kargrepr kargsn return run kargrepr kargs return run example of use def example dynkargs dynamickargsquestionultimate answer42 print class example n print var number dynkargsrunimfuncfunccodecoargcount print var names dynkargsrunimfuncfunccodecovarnames print defaults dynkargsrunimfuncfuncdefaults print run print dynkargsrun print dynkargs dynamic_kargs(question='foo', answer='bar') print 'function example \n----------------' print 'var number:', dyn_kargs.func_code.co_argcount print 'var names: ', dyn_kargs.func_code.co_varnames print 'defaults: ', dyn_kargs.func_defaults print 'run print: ', dyn_kargs() </code></pre> <p>the <code>example</code> function prints:</p> <pre><code>class example ------------- var number: 3 var names: ('self', 'answer', 'question', 'kargs') defaults: (42, 'ultimate') run print: {'answer': 42, 'question': 'ultimate'} function example ---------------- var number: 2 var names: ('answer', 'question', 'kargs') defaults: ('bar', 'foo') run print: {'answer': 'bar', 'question': 'foo'} </code></pre> <p>however:</p> <ul> <li>there might be problem if arguments value are not well represented by their <code>repr</code></li> <li>i think it is too complicated (thus not pythonic), and personally, i did not use it</li> </ul>

python how to compute date ranges from a list of dates

pmy slight variation on the theme i originally built startend lists and zipped them to return tuples but i preferred karl knechtels generator approachp precodefrom datetime import date timedelta oneday timedeltadays1 def finddatewindowsdates guard against getting empty list if not dates return convert strings to sorted list of datetimedates dates sorteddatemapintdsplit for d in dates build list of window starts and matching ends laststart lastend dates0 for d in dates1 if dlastend gt oneday yield startdatelaststart enddatelastend laststart d lastend d yield startdatelaststart enddatelastend codepre phere are the test casesp precodetests 20110227 20110228 20110301 20110412 20110413 20110608 20110608 20110227 20110228 20110301 20110412 20110413 20110608 20110610 for dates in tests print dates for window in finddatewindowsdates print window print codepre pprintsp precode20110227 20110228 20110301 20110412 20110413 20110608 startdate datetimedate2011 2 27 enddate datetimedate2011 3 1 start_date': datetime.date(2011, 4, 12), 'end_date': datetime.date(2011, 4, 13)} {'start_date': datetime.date(2011, 6, 8), 'end_date': datetime.date(2011, 6, 8)} ['2011-06-08'] {'start_date': datetime.date(2011, 6, 8), 'end_date': datetime.date(2011, 6, 8)} [] ['2011-02-27', '2011-02-28', '2011-03-01', '2011-04-12', '2011-04-13', '2011-06-08', '2011-06-10'] {'start_date': datetime.date(2011, 2, 27), 'end_date': datetime.date(2011, 3, 1)} {'start_date': datetime.date(2011, 4, 12), 'end_date': datetime.date(2011, 4, 13)} {'start_date': datetime.date(2011, 6, 8), 'end_date': datetime.date(2011, 6, 8)} {'start_date': datetime.date(2011, 6, 10), 'end_date': datetime.date(2011, 6, 10)} </code></pre>

rss feed parser library in python

pif you want an alternative try xmldomminidom like django is python rss is xmlp

pygame not checking keyevents after another happens

pi think what you need is thisp precodeif keypressedpygamekleft movementx 5 if eventtype pygamekeyup if eventkey pygamekleft and movementx lt 0 movementx 0 if keypressedpygamekright movementx 5 if eventtype pygamekeyup if eventkey pygamekright and movementx gt 0 movementx 0 codepre pand that would be it hope it helpsp

how to prevent a race condition when multiple processes attempt to write to and then read from a file at the same time

puse strikepidstrike an empty file to lock every time you access a file p pexample usagep precodefrom mercurial import error lock try l locklocktmp0lockformatfilename timeout600 wait at most 10 minutes do something except errorlockheld couldnt take the lock else lrelease codepre psource a hrefhttpstackoverflowcomquestions1444790pythonmoduleforcreatingpidbasedlockfilepython module for creating pidbased lockfileap pthis will give you a general idea this method is used in oo vim and other applications p

replace single quotes with double quotes in python for use with insert into database

precodewhile line restrain line2 to inside parentheses line1 rest linesplit line2 line3 restsplit a bit more cleaner newbits for bit in line2split remove border characters bit bit11 duplicate the ones inside if in bit bit bitreplace readd border newbitsappend bit sysstdoutwriteline1 joinnewbits line3 line fileinreadline codepre

date range filter in django

puse the coderangecode lookupp precodeenquirylist modelnameobjectsfilterdatepostedrangestartdateenddate codepre

mathgroup error from regex tuples in python

prefinallp blockquote preturn a list of all nonoverlapping matches in the stringp blockquote pyou probably want p precodefor mp yards in matchloc yards intyards if yards gt 130 codepre

avoid rounding float in python

pwhen i ran into a similar problem because of converting millisecond references to microseconds i had to convert to a string and loop over the string adding the needed 0s until the length of the string was correct then when the value was converted back to integer the calculations workedp precodethe data will be passed to strptime as as string vals valssplit a fractional part of the seconds nofrag frag vals length lenfrag this converts the fractional string to microseconds given unknown precision if length gt 6 frag frag05 else while length lt 6 frag frag 0 length 1 strptime requires even seconds with microseconds added later nofragdt dtdatetimestrptimenofrag ymd hms dt nofragdtreplacemicrosecondintfrag return dt codepre

python datetime strptime valueerror does not match format

pthis wayp precodetext 06082016 format mdy date datetimedatetimestrptimetext formatdate codepre

python how to join elements in a list that are separated by a certain value

pno need for list comprehension just find your delimiters and concatenate the restp precodea 1 2 3 c 4 c 5 6 7 c 8 firstindex aindexc revertedlastindex a1indexc index in reverted list lastindex lena 1 revertedlastindex 1 for 0indexed lists codepre pso we can now just join the part of list between codefirstindexcode and codelastindexcode and just concatenate the rest p precodenewlist afirstindex joinafirstindexlastindex alastindex codepre pedit by no need for list comprehension i mean of course no need for emexplicitem iteration the codeindexcode function does it internallyp

installing error with graphlab in ubuntu

pthat error often happens because graphlabcreate is installed in a different environment than the one youre working in are you using miniconda or virtualenv by any chance if so make sure to activate your working environment then download and install graphlabcreate then import in ipython jupyter notebook etcp

django admin add a custom link that runs a a function in a pop up next to a particular field

pyou can achieve it by writing javascript code in a file customjsp precodefunction function findfreeip ajax url customfindfreeip success functionresponse inputidfieldnamevalresponse documentreadyfunction inputidfieldnameafter lta hrefjavascript findfreeipgtfind free ipltagt thisjquery codepre padd below line in your settingspy if not already therep precodestaticfilesdirs ospathjoinbasedir static codepre pcreate a folder static in the same folder which has your app for simplicity and tracking create codestaticappnamejscustomjscodep pin your formspy add below line in the showroom data formp precodeclass media js appnamejscustomjs codepre pnow all you have to do is to write a custom view to return ip addressp pnote dont forget to add codeloginrequiredcode in your custom view and do proper validations in case this is role based functionalityp

python rock paper scissors game not always give correct answers

pyou almost had it correct as has been mentioned for each game the call to codecomputercode should only be made once it would also make sense to display the two players choices also as you are working in title case it would make sense to convert everything to use that to avoid needing to call codetitlecode so many timesp precodeimport random options rock paper scissors then check if the user loses wins ties def computer return randomchoiceoptions printn11 printwelcome to rock paper scissors print game print its you vs the computer print11 while true userchoice inputnwhat do you choose rock paper scissors title computerchoice computer printuser computer formatuserchoice computerchoice if userchoice in options possible userchoice time a userchoice can succeeds rock beats sicissor sicissors cuts paper paper covers rock if userchoice computerchoice printtie elif userchoice rock and computerchoice scissors printyou won crushes formatuserchoice computerchoice elif userchoice scissors and computerchoice rock printcomputer won crushes formatcomputerchoice userchoice elif userchoice scissors and computerchoice paper printyou won cuts formatuserchoice computerchoice elif userchoice paper and computerchoice scissors printcomputer won cuts formatcomputerchoice userchoice elif userchoice paper and computerchoice rock printyou won } covers {}".format(user_choice, computer_choice)) elif user_choice == 'rock' and computer_choice == 'paper': print("computer won! {} covers {}".format(computer_choice, user_choice)) else: print("make sure you choose either rock, paper or scissors") </code></pre> <p>so a game would look like:</p> <pre><code>-=--=--=--=--=--=--=--=--=--=--=- welcome to rock, paper, scissors game it's you vs. the computer! -=--=--=--=--=--=--=--=--=--=--=- what do you choose rock, paper, scissors: rock user: rock computer: scissors you won! rock crushes scissors </code></pre>

execfile for configuration error no such file or directory

ol lii would rename codemyconfigcfgcode to codemyconfigpycodeli libe sure that your config file and the file trying to get the data are in the same folderli listrongmyconfigpystrongli ol pcodedictionarydata1value1data2value2codep p4import the datap pcodefrom myconfig import dictionary print dictionarycodep

raise exception and halt execution in python c api code

ppv on a hrefhttpsgithubcomscipyscipyissues2570 relnofollowthis github issue for scipya explained what the issues are in short setjump and longjump in c could do this in principle but this is errorprone notably not being threadsafe this may be of use in other similar applications but using f2py is generally the better way to get fortran code to communicate with pythonp

caffe netpredict outputs random results googlenet

pplease check the image transformation you are using is it the same in training and testtimep pafaik bvlcgooglenet subtract image mean with one value per channel while your python codeclassifiercode uses different mean codemeannploadilsvrc2012meannpymean1mean1code this might cause the net to be unable to classify your inputs correctlyp

plot marginal for xaxis

pi think you need to call codeaxautoscaleviewcode after setting the margins an after the plotting 075 is a lot of margin thoughp precodeimport numpy as np import matplotlibpyplot as plt import datetime import matplotlibdates as mdates today datetimedatetoday imsidate datetimedate2016 1 11 datetimedate2016 1 14 datetimedate2016 1 18 imsiup 13 6 24 imsidown 4 23 1 ax pltsubplot axxaxisdate axyaxisgrid plotup axbarimsidate imsiup width075 colorr aligncenter plotdown axbarimsidate imsidown width075 colory aligncenter bottomimsiup axxaxissetmajorformattermdatesdateformatterymd axxaxissetminorlocatormdatesdaylocator limits t0 today datetimetimedelta7 t1 today axsetxboundt0 t1 axsetxmargin075 axautoscaleview lt this pltxticksrotationvertical pltsubplotsadjustbottom025 pltshow codepre pa hrefhttpistackimgurcomewwewpng relnofollowimg srchttpistackimgurcomewwewpng altenter image description hereap

how to find url containing one word and another using re in python

precodegtgtgt import re gtgtgt precompilehttpsfirstlevelssecondlevelshtml gtgtgt text random text httpwwwdomaincomfirstlevel020213secondlevelslughtml more random text httpwwwdomaincomlevelone020213secondlevelslughtml gtgtgt i pfinditertext gtgtgt for m in i printmgroup httpwwwdomaincomfirstlevel020213secondlevelslughtml gtgtgt codepre phthp

how to stop python from printing commas from a csv file

pyoure outputting the file the same way as it is on disk if you want to parse the file you should check out the a hrefhttpsdocspythonorg2librarycsvhtml relnofollowcsv modulea of pythonp

windows gstreamer alsa alternative

pnot sure if this is still relevant but i had the exact same problem today i got around it by using autoaudiosinkp pthat way i got the minimal example on the following website to work in windows xpp pa hrefhttpwwwjonobaconorg20060828gettingstartedwithgstreamerwithpython relnofollowhttpwwwjonobaconorg20060828gettingstartedwithgstreamerwithpythonap phere is my version of the code essentially the same except for the alsasinkp precodeusrbinpython import pygst pygstrequire010 import gst import pygtk import gtk class main def initself selfpipeline gstpipelinemypipeline selfaudiotestsrc gstelementfactorymakeaudiotestsrc audio selfpipelineaddselfaudiotestsrc selfsink gstelementfactorymakeautoaudiosink sink selfpipelineaddselfsink selfaudiotestsrclinkselfsink selfpipelinesetstategststateplaying startmain gtkmain codepre pi hope that helpsp

htmltotext conversion using python standard library only

pi would also suggest that you should take a look at a hrefhttpwwwaaronswcom2002html2text relnofollowhtml2texta br also take a look at another a hrefhttpstackoverflowcomquestions328356extractingtextfromhtmlfileusingpythonthreadap

how do i add the trustedhost in pycharm package install

pafter some digging i found the answer registering it here in case someone is interestedp pgo to emfileem emsettingsem project emnameoftheprojectem emproject interpreterem choose double click the package you want to update and the emavailable packagesem will popup there is a checkbox emoptionsem on the lowerleft part of the window check that and enter emtrustedhostem option and hit the eminstall packageem buttonp pthat way i was able to update the package from the insecure host thus solving my problemp

delete fulfilling condition row from a file

pa python solution to this would bep precodefile openmyfiletxt file2 openmyfile2txt a for i line in enumeratefile strlist linesplit if not strlist2 strlist3 and strlist7 inf file2writeline fileclose file2close codepre pthis assumes that the values are separated by spacesp

find currency code in price string

pits veryvery ghetto butp precodeimport string filter stringdigits currency ch for ch in s if ch not in filter0 codepre

how to add methods to customised searchfields in django adminmodeladmin

pdjango is not able to search on properties as youve discovered however you can simply add the codefirstnamecode and codelastnamecode fields to your codesearchfieldscode and it will work as expectedp pif youre needing to do exact matching on the entire name value my recommendation would be to add a denormalized field perhaps called codefullnamecode that is kept in sync via a postsave signalp

how do most people do consolelog debugging in python

pthe expectation is that you a hrefhttpsdocspythonorg2howtologginghtmlusingarbitraryobjectsasmessages relnofollowimplement your own codestrcode methoda so that you can pick what is important to log in your diagsp phowever there is the option to log the whole object dictionary in a pretty format using a couple of lines of code for examplep precodefrom pprint import pformat class aobject def initself selffoo 1 selfbar hello world selfprivate 0 a a print pformatvarsa you can also pass pformat to your logger if thats what you have codepre pthis will return something like this depending on how much data you have and thw codewidthcode constraintp precodeprivate 0 bar hello world foo 1 codepre

i need to add a to my output of denominations used

pcan you add a codecode to your codeprintcode statementp precodeprint0 2d182fformatamountdenomiuseddenomiend codepre porp precodeprint0 2d 182fformatamountdenomiuseddenomiend codepre pyou can place the codecode wherever you wish within the string you can also add any other characters eg codecode or codecode within the stringp pto remove white spaces around the variables use codestripcodep precodeprint0 2d 182fformatamountdenomistripuseddenomistripend codepre pif codeamountdenomcode and codeuseddenomcode are not strings first convert using codestrcodep precodeprint0 2d 182fformatstramountdenomistripstruseddenomistripend codepre

using a post request to grab filtered data from python flask and update current webpage

pone easy option is to have a div for your content that you filter dynamically when you first hit the route it will just render all content without any filters when you change your filter it will remove that content and replace it with the results of your filterp pworking off your codep precodejobsearchform selectnamefilterchangefunction ev get the filters var container datacontainer postapijobsearch function data containerempty empty the current contents dataeachfunction job containerappendjobname codepre pthis is just a brief example to show concept i would recommend choosing a front end framework to make the containment of data on the front end more manageablep

how to write a python script to manipulate google spreadsheet data

pgspread is probably the fastest way to begin this process however there are some speed limitations on updating data using gspread from your localhost if youre moving large sets of data with gspread for instance moving 20 columns of data over a column you may want to automate the process using a cron jobp

find if background image is used for any html tag with inline style

paccording to a hrefhttpwwwxmlmecomxpathtoolaspx relnofollowxmlmecoms xpathtoola this xpath should workp precodecontainsstylebackgroundimage codepre phere is my test resultp pimg srchttpistackimgurcoms315kpng altenter image description herep

how to switch nodes at an index with the head of a list

pswitching elements in a list is actually very easyp precodemylist0 mylist1 mylist1 mylist0 codepre pthis will swap the first and second elements in codemylistcode in place python actually has an optimized bytecode command that very quickly swaps two values on the program stack so this is about as fast as you can swap list valuesp pof course in that case you wouldnt be returning a new list youd be modifying the old one so instead of codemylist switchmylist 2code you would just write codeswitchmylist 2code the code would look something like thisp precodedef switchlst i lst0 lsti lsti lst0 codepre pif you want to return an entirely new list youd need to make a copy firstp precodedef switchlst i newlst listlst newlst0 newlsti newlsti newlst0 return newlst codepre pedit if youre working with a linked list that is a bit of a different story i dont think python optimizations exist for linked lists regular lists are very easy to add items to and they work with any kind of object so linked lists very much lose their purpose in python nevertheless heres a suggestionp precodedef switchll i head ll currentitem ll the head again previtem none the item that links to tempitem for x in rangei find the item to swap previtem currentitem currentitem currentitemnext now we swap were rotating three items next values so we cant do the really optimized way temp currentitemnext currentitemnext headnext headnext previtemnext previtemnext temp codepre plinked list manipulation is all about maintaining proper links to the next item also note that the above code will fail if youre trying to swap for a position that doesnt actually exist in your linked list check your inputsp

in what case would i use a tuple as a dictionary key

pyou use tuples as keys when you want to show multiple elements which form a key togetherp peg codeltxcoordinategtltycoordinategt ltindicating lettergtcodep phere if we use codexcoordinatecode or codeycoordinatecode separately we wouldnt be representing that pointp

format of time with sqlalchemy in flaskadmin and daterangepicker

palright i figure it outp pi post my solution here a hrefhttpsgithubcomflaskadminflaskadminissues1210 relnofollowhttpsgithubcomflaskadminflaskadminissues1210ap

ssl certificate verify failed sslc600

pi dont know if this will work for you because i dont know your code but i had the same problem with this 4 lines my code work perfectp pip precodeimport request disable ssl warning requestspackagesurllib3disablewarnings context sslsslcontextsslprotocoltlsv1 contextverifymode sslcertnone codepre pip pwhen you connect set the parameter of sslcontext to context p

where to define a method that is used only inside init and must not be called anywhere else

pyou could get rid of it once youre donep precodeclass lineobject def initself selflength none selfassignvaluetolength selfassignvaluetolength none def assignvaluetolengthself selflength 50 codepre pthis isnt very good practice though instead id just add an assertionp precode def assignvaluetolengthself assert selflength is none selflength 50 codepre

python making a readonly property accessible via varssomeclass

pif i understood you correct something like this should workp precodeprint eval foobarformat dict v v for v in dir foo codepre pbut nevertheless this feels somehow very badp

how to interact with an external scriptprogram

pin fact ossystem and ospopen are now deprecated and subprocess is the recommended way to handle all sub process interactionp

python oswalk on a different computer on the same network

pmy thought is also to go for linux or at least windows with ssh servicep ol lia hrefhttpwwwpetefreitagcomitem532cfm relnofollowset up public key authentication over ssha and make sure you can ssh to that windows machine with ssh service on of course without password and password phraseli limake use of a hrefhttpdocsfabfileorgen143indexhtml relnofollowfabrica a python 25 or higher library and commandline tool for streamlining the use of ssh for application deployment or systems administration tasksli ol

how to change ticklabels within figure created with axisartist

pim not certain but it looks like youre doing something slightly different from what they are talking about in the documentation when they say you can use codeaxsetxtickscode like normal p pi think that you might need to set the ticklabels at the time the axes are created when codegridhelpercurvelinearcode is called one of the keyword arguments is codetickformatter2code thats what you need to use first you need to import the formatter change p precodefrom mpltoolkitsaxisartistgridfinder import maxnlocator codepre pto p precodefrom mpltoolkitsaxisartistgridfinder import maxnlocator dictformatter codepre pcodedictformattercode takes a dictionary on initialization when the formatter is passed a location it looks in the dictionary to see if theres a corresponding string right now the locations are 0 25 5 75 1 lets say i want to change those to 5 10 15 20 25 i would create a dictionaryp precoderlocs 0 25 5 75 1 rlabels 5 10 15 20 25 rticks loc label for loc label in ziprlocs rlabels codepre pnotice that coderlabelscode is a list of strings this is important codedictformattercode will throw an error if you try to use ints then i add the keyword argument coderlabels nonecode to codefractionalpolaraxescode and change the code inside a bitp precodeif rlabels rlabels dictformatterrlabels gridhelper gridhelpercurvelineartr extremesth0 th1 r0 r1 gridlocator1thetagridlocator gridlocator2rgridlocator tickformatter1thetatickformatter tickformatter2rlabels codepre pnow i just need to call codefractionalpolaraxescode with the dictionary i madep precodea1 fractionalpolaraxesf1 thlim(-90, 90),step=(10, 0.2), theta_offset=90, rlabels = r_ticks) </code></pre> <p>and here's the result:</p> <p><a href="http://i.stack.imgur.com/foyxz.png" rel="nofollow"><img src="http://i.stack.imgur.com/foyxz.png" alt="polar axes graph"></a></p> <p>here's the entire code:</p> <pre><code>from __future__ import division from __future__ import print_function import numpy as np import matplotlib.pyplot as plt from matplotlib.transforms import affine2d from matplotlib.projections import polaraxes from mpl_toolkits.axisartist import angle_helper from mpl_toolkits.axisartist.grid_finder import maxnlocator, dictformatter from mpl_toolkits.axisartist.floating_axes import gridhelpercurvelinear, floatingsubplot def fractional_polar_axes(f, thlim=(0, 180), rlim=(0, 1), step=(30, 0.25), thlabel='theta', rlabel='r', ticklabels=true, theta_offset=0, rlabels = none): '''return polar axes that adhere to desired theta (in deg) and r limits. steps for theta and r are really just hints for the locators.''' th0, th1 = thlim # deg r0, r1 = rlim thstep, rstep = step tr_rotate = affine2d().translate(theta_offset, 0) # scale degrees to radians: tr_scale = affine2d().scale(np.pi/180., 1.) #pa = axes(polar="true") # create a polar axis pa = polaraxes tr = tr_rotate + tr_scale + pa.polartransform() theta_grid_locator = angle_helper.locatordms((th1-th0)//thstep) r_grid_locator = maxnlocator((r1-r0)//rstep) theta_tick_formatter = angle_helper.formatterdms() if rlabels: rlabels = dictformatter(rlabels) grid_helper = gridhelpercurvelinear(tr, extremes=(th0, th1, r0, r1), grid_locator1=theta_grid_locator, grid_locator2=r_grid_locator, tick_formatter1=theta_tick_formatter, tick_formatter2=rlabels) a = floatingsubplot(f, 111, grid_helper=grid_helper) f.add_subplot(a) # adjust x axis (theta): print(a) a.axis["bottom"].set_visible(false) a.axis["top"].set_axis_direction("bottom") # tick direction a.axis["top"].toggle(ticklabels=ticklabels, label=bool(thlabel)) a.axis["top"].major_ticklabels.set_axis_direction("top") a.axis["top"].label.set_axis_direction("top") a.axis["top"].major_ticklabels.set_pad(10) # adjust y axis (r): a.axis["left"].set_axis_direction("bottom") # tick direction a.axis["right"].set_axis_direction("top") # tick direction a.axis["left"].toggle(ticklabels=true, label=bool(rlabel)) # add labels: a.axis["top"].label.set_text(thlabel) a.axis["left"].label.set_text(rlabel) # create a parasite axes whose transdata is theta, r: auxa = a.get_aux_axes(tr) print(auxa) # make aux_ax to have a clip path as in a?: auxa.patch = a.patch # this has a side effect that the patch is drawn twice, and possibly over some other # artists. so, we decrease the zorder a bit to prevent this: a.patch.zorder = -2 # add sector lines for both dimensions: thticks = grid_helper.grid_info['lon_info'][0] rticks = grid_helper.grid_info['lat_info'][0] print(grid_helper.grid_info['lat_info']) for th in thticks[1:-1]: # all but the first and last auxa.plot([th, th], [r0, r1], ':', c='grey', zorder=-1, lw=0.5) for ri, r in enumerate(rticks): # plot first r line as axes border in solid black only if it isn't at r=0 if ri == 0 and r != 0: ls, lw, color = 'solid', 1, 'black' else: ls, lw, color = 'dashed', 0.5, 'grey' # from http://stackoverflow.com/a/19828753/2020363 auxa.add_artist(plt.circle([0, 0], radius=r, ls=ls, lw=lw, color=color, fill=false, transform=auxa.transdata._b, zorder=-1)) return auxa if __name__ == '__main__': f1 = plt.figure(facecolor='white') r_locs = [0, .25, .5, .75, 1] r_labels = ['5', '10', '15', '20', '25'] r_ticks = {loc : label for loc, label in zip(r_locs, r_labels)} a1 = fractional_polar_axes(f1, thlim=(-90, 90),step=(10, 0.2), theta_offset=90, rlabels = r_ticks) # example spiral plot: thstep = 10 th = np.arange(-90, 90+thstep, thstep) # deg rstep = 1/(len(th)-1) r = np.arange(0, 1+rstep, rstep) a1.plot(th, r, 'b') plt.show() </code></pre>

how to append a string to only consonants in a list

pi think the problem is in your approach to the problem try to do something like this p pedit although theres a better pythonic answer in this question thanks to dano this one does not require additional librariesp precodevowels a e i o u def oppishword result first true prevvowel false for letter in listword if letter in vowels and not first and not prevvowel resultappendop prevvowel true else prevvowel false resultappendletter first false if not prevvowel resultappendop print joinresult oppishstreet gt stropeetop codepre ptip dont waste your time defining both vowels and consonants in fact there are vowels and nonvowelsp

python how to connect to oracle database using jdbc

pas mentioned in the question the full path to the jar file for the jdbc driver must be present in either the classpath or the jythonpath environment variable so the jython script can find it these variables can be modified in several ways depending on the environment shell being used as described in the jata tutorial herep pa hrefhttpdocsoraclecomjavasetutorialessentialenvironmentpathshtml relnofollowpath and classpathap pin this particular case simply adding the line p pre classlangnone prettyprintoverridecodeexport classpathusrliboracle121client64libojdbc6jar codepre pto one of the startup files eg bashprofile profile bashrc and then logging back in or running codesourcecode on the file was the solutionp

python django storing a class name to later instantiate an object

pyou can use the a hrefhttpsdocspythonorg2libraryfunctionshtmlglobals relnofollowcodeglobalscodea dictionary to do thisp precodemyclass globalsfullyqualifiedclassname codepre pthen initialize an object using that classp precodemyobject myclass codepre

convert empty dictionary to empty string

pconvert each item in the dictionary to a string then join them with the empty stringp precodegtgtgt joinmapstrd codepre

class methods when overloading addition operator in python

pfor a better way take a look at codenumpypoly1dcode which is implemented as a function instead of a class something like this might suit your needsp pre classlangpy prettyprintoverridecodedef polycoeffs def polyxcoeffscoeffs return sumcxi for ic in enumeratecoeffs return poly codepre pthen you can use it like thisp pre classlangpy prettyprintoverridecodefn poly456 ret fn7 assertret 333 codepre pin this example i calculatedp precode4 5 7 6 72 codepre

looping in python

pyou could put everything in a while loop which could repeat forever or until a user types a certain phrasep precodeimport math import sys import os print this program will calculate the area height and perimeter of the triangles scalene isosceles equilateral and a right angled triangle while true calculate the perimeter print please enter each side for the perimeter of the triangle a floatinputenter side a b floatinputenter side b c floatinputenter side c perimeter a b c print the perimeter for this triangle is perimeter calculate the area print please enter each side for the area of the triangle a floatinputenter side a b floatinputenter side b c floatinputenter side c s a b c 2 sp a b c 2 area ssasbsc 05 area mathsqrtspsp asp bsp c print the area for this triangle is 02f area calculate the height height area 2 print the height of this triangle is height codepre por p precodewhile answerlower in yes y code answer inputwould you like to repeat codepre pyou could also put it all into a function codedef maincode and then do some form of recursion calling a function in itselfp pthose are just a few ways there are a ton of ways you can get what you wantp

how to get only the first element of a touple list into an array

pyou need to select the first element of the tuplep precoder rs0 for rs in list if rs not ingj codepre

python elementtree copy node with childs

pfor future referencep psimplest way to copy a node or tree and keep its children without having to import stronganotherstrong library emonlyem for thatp precodeimport xmletreeelementtree def copytree treeroot return etelementtree treeroot duplicatednodetree copytree node typeduplicatednodetree is elementtree duplicatedtreerootelement newtreegetroot typeduplicatedtreerootelement is element codepre

passing stdout to two different places

psince as jf sebastian said stdout amp communicate consume the process stdout your problem is analogous to using a python generator you can only get the process output once p pthe solution if i understand your question correctly then you just want to use the output of the process twice in that case assign it to a variable once and call that variable as many times as you wish egp psection 1p precodeif v1get 1 reply subprocesspopenargs stdoutsubprocesspipe stderrsubprocesspipe data error replycommunicate outputtextinsertend data for line in data the stdout is in data replystdout wont be useful here since you called communicate do stuff with data codepre palternatively in section 2p precodeif v1get 1 reply subprocesspopenargs stdoutsubprocesspipe stderrsubprocesspipe data replystdout you can call this variable as many times as you want and it will return the same data for line in data inputtextinsertend machinename has matching profiles n data error replycommunicate lt this would reset data to outputtextinsertend data codepre pheres an example of data being resetp precodex subprocesspopenecho ok stdoutsubprocesspipe shelltrue for line in xstdout print line this prints ok as expected tup xcommunicate tup none this is true since xstdout consumed the output codepre pdoes that answer your qp

why does periodically pressing the enter key substantially speed up my code

pi believe this has something to do with the ide that you are using to execute your codep pi have run your code with syntax alterations for 33 and got the same time to execute both times p p999 809542283367021p pbeditb this was performed in stock idle with python 33 i spammed the enter key with multiple experiments and witnessed no time difference between string output on the control v the experimentp pon a hunch i decided to remove a print function and condense it into one linep precodeprinti gt clockc codepre pthis produced 999 7141783124325343p pon this basis i believe that the time differential you are seeing is due to the ide sucking up more threads to process your code which results in faster times clearly the time at the end is the total amount of time to compute and print your for loopp pto confirm my suspicion i decided to put everything into a list of tuples and then print that listp precodedef newspeedtest speedlist c clock for i in range1000 speedlistappendi clockc printspeedlist1 codepre pwhich output 999 00005668934240929957p pto conclude my experiment confirms it is how iyour idei handles output and cpu consumptionp

python convert a number to a string as is

pthe first step would be however you are getting a number that you think should be 00000 instead of 0 dont actually convert it to a number just keep it as a stringp

pserve is complaining that initpy has no main attribute

pdo you have the py source code that goes with that pyc if so does it have a strongmainstrong p

how to add space after string and remove a space

plet me know if following do the trickp precodefrom seleniumwebdrivercommonkeys import keys departfrom driverfindelementbyiddepartureairportinput departfromclear departfromsendkeys departfromsendkeysuue003 departfromsendkeysfrom codepre

python orm for turnbased strategy game

pa hrefhttpwwwsqlalchemyorg relnofollowsqlalchemya meets most of your requirements except this p blockquote p but i need the history of each turn database state retained so i can look at any game turn state in pastp blockquote pi am not sure what you intend herep

issues with slicing multidimensional list

pyou could start with something like thisp precodesquare1 boardij for i in range03 for j in range03 square2 boardij for i in range03 for j in range26 codepre por in a slightly more elegant wayp precodedef squareab squareab boardij for i in range3a33a for j in range3b3 3b codepre

read specific column from datfile

ptry thisp precodeinfile openinputtxt for line in infile list linesplit if lenlist gt 10 printlist9 codepre pof course you could save this values to some list o dictp

python opening multiple files using opennpload

pi dont think that this could be archived with open function it returns a file object for each file you are opening and its not possible to pass a list of paths to that functionp pwhat you can do is define a list with paths or a list to manage different file objects one for each file you want to openp precodepaths path1path2path3 files for path in paths try filesappendopenpath ltmodegt except ioerror print file couldnt be opened or doesnt existformatpath codepre por using withp precodefor path in paths try with openpath ltmodegt as mydata myfunctionmydata except ioerror print file couldnt be opened or doesnt existformatpath codepre

save file python ioerror permission denied

pit may appear a bit convoluted but i suggest that you might want to investigate the etcsudoers filebr for your purposes you would create the file somewhere that you do have permissions like tmp and then codemovecode it to codevarwwwhtmlimagescode using a script that is named as a codesudoerscode codecmndaliascodebr you still need to envoke the codecmndaliascode script with codesudocode but if you have declared it with codenopasswdcode then it should just function without asking for the codesudocode passwordp palways access the codeetcsudoesrscode file using codevisudocodebr an example of the entries in that file p precode cmnd alias specification cmndalias web hometests codepre pand then later in the file p precode user privilege specification root allallall all rolf allallall nopasswdweb codepre pwith this the codehometestshcode will perform whatever task the user coderolfcode sets it such as moving a file from codetmpcode to codevarwwwhtmlimagescode when the command line codesudo hometestshcode is issued without asking for the passwordp

creating a table like structure in python

pyour question is a bit confusing youre talking about data structure and persistence then about list box gui stuffp pwrt the data structure and persistence part a table like structure with rows and columns is easily modeled as a list of ducts or list of tuples for the perstitance part you can serialize your list as json and write it to a file or write it as csv using the stdlib cvs package or use a sql dbp

how to take a user sentence and create a list of words out of it

pyou found re already there is a nice example of splitting a stringp precoderesplitw words words words codepre plike this you get all words all punctuation removedp

preview form in a template based on a dropdown options in django

pok that explains things the problem is that youre not creating an actual codetemplatecode object at any point changing two lines will fix itp precodedef mailcreaterequest context requestcontextrequest if requestmethod post form mailformrequestpost if formisvalid if preview in requestpost post formsavecommitfalse t formcleaneddatatemplate tmpl templatettemplatebody lt preview tmplrendercontextcontextdict lt return httpresponsepreview codepre pmake sure you have codefrom djangotemplate import templatecode up topp pbtw codemailtemplatenamecode should really be a codecharfieldcodep

how to add a string to a specific line

pif the file to read is big and you dont want to read the whole file in memory at oncep precodefrom tempfile import mkstemp from shutil import move from os import remove close linenumber 20 filepath myfiletxt fhr openfilepath fh abspath mkstemp fhw openabspath w for i line in enumeratefhr if i linenumber 1 fhwwrite line else fhwwriteline fhrclose closefh fhwclose removefilepath moveabspath filepath codepre pstrongnote i used aloks answer a hrefhttpstackoverflowcomquestions2081836readingspecificlinesonlypythonherea as a referencestrongp

appending multiple values to an xml file in python is there a better way to do it than s

pi would suggest you use any of the million template engines out there and do not build it using beautiful soupxmldom its like building html using codeltdivgtappendcode lt please dont do that eitherp pdo this if you want the most plug and play solutionp precodefrom makotemplate import template class objobject def initself d for a b in ditems if isinstanceb list tuple setattrself a objx if isinstancex dict else x for x in b else setattrself a objb if isinstanceb dict else b deploy couchbase gamebucket name game password uris ltadd uri gtltadd urijoin httpcouchbasechubistaging18091pools httpcouchbasechubistaging28091pools httpcouchbasechubistaging38091pools gt administrator username game password uris ltadd uri gtltadd urijoin httpcouchbasechubistaging18091pools httpcouchbasechubistaging28091pools httpcouchbasechubistaging38091pools gt sessionbucket name: 'session', 'password': '', 'uris': '&lt;add uri="' + '" /&gt;&lt;add uri="'.join([ 'http://couchbase.chubi.staging1:8091/pools', 'http://couchbase.chubi.staging2:8091/pools', 'http://couchbase.chubi.staging3:8091/pools' ]) + '" /&gt;' } } } template = template("""&lt;couchbase&gt; &lt;servers bucket="${deploy.couchbase.gamebucket.name}" bucketpassword="${deploy.couchbase.gamebucket.password}"&gt; ${deploy.couchbase.gamebucket.uris} &lt;/servers&gt; &lt;socketpool minpoolsize="50" maxpoolsize="250" queuetimeout="00:00:00.250" /&gt; &lt;/couchbase&gt; &lt;couchbasecluster&gt; &lt;servers username="${deploy.couchbase.administrator.username}" password="${deploy.couchbase.administrator.password}"&gt; ${deploy.couchbase.gamebucket.uris} &lt;/servers&gt; &lt;/couchbasecluster&gt; &lt;couchbasesession&gt; &lt;servers bucket="${deploy.couchbase.sessionbucket.name}" bucketpassword="${deploy.couchbase.sessionbucket.password}"&gt; ${deploy.couchbase.sessionbucket.uris} &lt;/servers&gt; &lt;/couchbasesession&gt; """) print template.render(deploy=obj(deploy)) </code></pre> <p>output:</p> <pre><code>&lt;couchbase&gt; &lt;servers bucket="game" bucketpassword=""&gt; &lt;add uri="http://couchbase.chubi.staging1:8091/pools" /&gt;&lt;add uri="http://couchbase.chubi.staging2:8091/pools" /&gt;&lt;add uri="http://couchbase.chubi.staging3:8091/pools" /&gt; &lt;/servers&gt; &lt;socketpool minpoolsize="50" maxpoolsize="250" queuetimeout="00:00:00.250" /&gt; &lt;/couchbase&gt; &lt;couchbasecluster&gt; &lt;servers username="game" password=""&gt; &lt;add uri="http://couchbase.chubi.staging1:8091/pools" /&gt;&lt;add uri="http://couchbase.chubi.staging2:8091/pools" /&gt;&lt;add uri="http://couchbase.chubi.staging3:8091/pools" /&gt; &lt;/servers&gt; &lt;/couchbasecluster&gt; &lt;couchbasesession&gt; &lt;servers bucket="session" bucketpassword=""&gt; &lt;add uri="http://couchbase.chubi.staging1:8091/pools" /&gt;&lt;add uri="http://couchbase.chubi.staging2:8091/pools" /&gt;&lt;add uri="http://couchbase.chubi.staging3:8091/pools" /&gt; &lt;/servers&gt; &lt;/couchbasesession&gt; </code></pre> <p>by far the cleanest solution would be changing things around a tiny bit:</p> <pre><code>from mako.template import template class obj(object): def __init__(self, d): for a, b in d.items(): if isinstance(b, (list, tuple)): setattr(self, a, [obj(x) if isinstance(x, dict) else x for x in b]) else: setattr(self, a, obj(b) if isinstance(b, dict) else b) deploy = { 'couchbase': { 'gamebucket': { 'name': 'game', 'password': '', 'uris': [ 'http://couchbase.chubi.staging1:8091/pools', 'http://couchbase.chubi.staging2:8091/pools', 'http://couchbase.chubi.staging3:8091/pools' ] }, 'administrator': { 'username': 'game', 'password': '', 'uris': [ 'http://couchbase.chubi.staging1:8091/pools', 'http://couchbase.chubi.staging2:8091/pools', 'http://couchbase.chubi.staging3:8091/pools' ] }, 'sessionbucket': { 'name': 'session', 'password': '', 'uris': [ 'http://couchbase.chubi.staging1:8091/pools', 'http://couchbase.chubi.staging2:8091/pools', 'http://couchbase.chubi.staging3:8091/pools' ] } } } template = template("""&lt;couchbase&gt; &lt;servers bucket="${deploy.couchbase.gamebucket.name}" bucketpassword="${deploy.couchbase.gamebucket.password}"&gt; % for url in deploy.couchbase.gamebucket.uris: &lt;add uri="${url}" /&gt; % endfor &lt;/servers&gt; &lt;socketpool minpoolsize="50" maxpoolsize="250" queuetimeout="00:00:00.250" /&gt; &lt;/couchbase&gt; &lt;couchbasecluster&gt; &lt;servers username="${deploy.couchbase.administrator.username}" password="${deploy.couchbase.administrator.password}"&gt; % for url in deploy.couchbase.gamebucket.uris: &lt;add uri="${url}" /&gt; % endfor &lt;/servers&gt; &lt;/couchbasecluster&gt; &lt;couchbasesession&gt; &lt;servers bucket="${deploy.couchbase.sessionbucket.name}" bucketpassword="${deploy.couchbase.sessionbucket.password}"&gt; % for url in deploy.couchbase.gamebucket.uris: &lt;add uri="${url}" /&gt; % endfor &lt;/servers&gt; &lt;/couchbasesession&gt;""") print template.render(deploy=obj(deploy)) </code></pre> <p>output:</p> <pre><code>&lt;couchbase&gt; &lt;servers bucket="game" bucketpassword=""&gt; &lt;add uri="http://couchbase.chubi.staging1:8091/pools" /&gt; &lt;add uri="http://couchbase.chubi.staging2:8091/pools" /&gt; &lt;add uri="http://couchbase.chubi.staging3:8091/pools" /&gt; &lt;/servers&gt; &lt;socketpool minpoolsize="50" maxpoolsize="250" queuetimeout="00:00:00.250" /&gt; &lt;/couchbase&gt; &lt;couchbasecluster&gt; &lt;servers username="game" password=""&gt; &lt;add uri="http://couchbase.chubi.staging1:8091/pools" /&gt; &lt;add uri="http://couchbase.chubi.staging2:8091/pools" /&gt; &lt;add uri="http://couchbase.chubi.staging3:8091/pools" /&gt; &lt;/servers&gt; &lt;/couchbasecluster&gt; &lt;couchbasesession&gt; &lt;servers bucket="session" bucketpassword=""&gt; &lt;add uri="http://couchbase.chubi.staging1:8091/pools" /&gt; &lt;add uri="http://couchbase.chubi.staging2:8091/pools" /&gt; &lt;add uri="http://couchbase.chubi.staging3:8091/pools" /&gt; &lt;/servers&gt; &lt;/couchbasesession&gt; </code></pre> <p>if you have it in a template, and believe me there is no real difference if you're using <code>mako</code> or <code>jinja2</code> or <code>django templates</code> is whatever you feel most comfortable with, you can get a great birds eye view of what it generates. if you create it using xml dom objects, theres no telling what the heck that does at a glance. its all about <code>readability</code> not about how clever you think you are for making what should have been 40 lines into 10 and not having a damn idea what it does 2 weeks from now when you come back to make a minor adjustment.</p> <p>also i should add; the class i have <code>obj</code> was just there so i didnt have to change your existing structure. i really do hope its an object.</p> <hr> <p>here be dragons.......</p> <pre><code>from lxml import etree deploy = { 'couchbase': { 'gamebucket': { 'name': 'game', 'password': '', 'uris': [ 'http://couchbase.chubi.staging1:8091/pools', 'http://couchbase.chubi.staging2:8091/pools', 'http://couchbase.chubi.staging3:8091/pools' ] }, 'administrator': { 'username': 'game', 'password': '', 'uris': [ 'http://couchbase.chubi.staging1:8091/pools', 'http://couchbase.chubi.staging2:8091/pools', 'http://couchbase.chubi.staging3:8091/pools' ] }, 'sessionbucket': { 'name': 'session', 'password': '', 'uris': [ 'http://couchbase.chubi.staging1:8091/pools', 'http://couchbase.chubi.staging2:8091/pools', 'http://couchbase.chubi.staging3:8091/pools' ] } } } root = etree.element("root") couchbase = etree.element("couchbase") servers = etree.element( "servers", bucket=deploy['couchbase']['gamebucket']['name'], bucketpassword=deploy['couchbase']['gamebucket']['password'] ) for url in deploy['couchbase']['gamebucket']['uris']: servers.append(etree.element("add", uri=url)) servers.append( etree.element( "socketpool", minpoolsize="50", maxpoolsize="250", queuetimeout="00:00:00.250" ) ) couchbase.append(servers) print etree.tostring(couchbase, pretty_print=true) </code></pre> <p>you would need to still do the other two.. please dont do this!!! its hard on the eyes. i feel pretty dirty just showing this example of what not to do!!!</p> <hr>

scraping biographycom using urllib2

pyou can discover an api url with httpfox firefox addon fe a hrefhttpwwwbiographycomapiitemsearchconfigpublishedampquerymarx relnofollowhttpwwwbiographycomapiitemsearchconfigpublishedampquerymarxa brings you a json you can process searching for people to retrive biography links or you can use an screen crawler like seleniump

write a function getsumoffirstdigitnumlist that takes in a list of positive numbers and returns the sum of all the first digit in the list

precodedef getsumoffirstdigitnum sum0 for x in num tempstrx sumsuminttemp0 return sum codepre

django querying using array for column value

pdo it this wayp precodeimport operator from functools import reduce def getsearchquerysearch list columnsnone breaks up the search string and makes a query list filters the given list based on the query list if not columns return list search searchstripsplit queries for col in columns queriesextendqcolicontains value for value in search return listfilterreduceoperatoror queries codepre

why i dont need to declare encoding when using python interpreter

pi suppose an interactive session of python use the a hrefhttpsdocspythonorg2librarysyshtmlsysgetfilesystemencoding relnofollowcodesystem encodingcodea see also a hrefhttpstackoverflowcomquestions2421145pythonunicodestringsandthepythoninteractiveinterpreterpython unicode strings and the python interactive interpreterap pwhen it read a source file it need to know how to interpret the data its parsing its logical the script is not necessary written in the same encoding than the terminal executing it and even more when the script is ran without an environment specifying the encodingp palso it is interesting to read strongjoel spolskystrong a hrefhttpwwwjoelonsoftwarecomarticlesunicodehtml relnofollowthe absolute minimum every software developer absolutely positively must know about unicode and character setsa which might explain why python choose to require the developers to be explicit about the encoding which i would have preferred that they set a default to utf8 but their way is coherent with the a hrefhttpswwwpythonorgdevpepspep0020 relnofollowzen of pythonap

how to stem large csv file using porterstemmer in python

pyoull probably have to read the entire csv file and stem each cell the a hrefhttpsdocspythonorg2librarycsvhtml relnofollowpython codecsvcode librarya will allow you to read the csv file youll probably want to use codecsvreadercode or codecsvdictreadercode the first will allow you to loop through the rows of the csv and read them individually the second will automatically put the data from the csv into a python a hrefhttpwwwtutorialspointcompythonpythondictionaryhtm relnofollowdictionarya either would be a good option for your task p ponce you have read in the csv you will need to stem the words you have read in you might use the a hrefhttpwwwnltkorg relnofollowcodenltkcode librarya which you might need to install if you have not already done that a hrefhttpwwwnltkorghowtostemhtml relnofollowherea is a resource about stemming with codenltkcodep

combining two record arrays

precodeusrbinenv python import numpy as np desc names genderageweight formats s1 f4 f4 a nparraym640750f250600 dtypedesc b nparraym640750f250600 dtypedesc alenashape0 blenbshape0 aresizealenblen aalenb codepre pthis works with structured arrays though not recarrays perhaps this is a good reason to stick with structured arraysp

getting live output from running unix command in python

pmost programs will use block buffered output if they are not connected to a tty so you need to run the program connected to a pty the easiest way is to use a hrefhttppypipythonorgpypipexpect relnofollowpexpectap precodefor line in pexpectspawncommand arg1 arg2 print line codepre

how to upload small files to amazon s3 efficiently in python

psample parallel upload times to amazon s3 using the python boto sdk are available herep ul lia hrefhttplspwdio201306parallels3uploadsusingbotoandthreadsinpython relnofollowparallel s3 uploads using boto and threads in pythonali ul prather than writing the code yourself you might also consider calling out to the a hrefhttpsawsamazoncomcli relnofollowaws command line interface clia which can do uploads in parallel it is also written in python and uses botop

handle autoredirects in python request module

pyou should strongnotstrong be setting the codecontenttypecode header leave that to the coderequestscode module as it needs to communicate the multipart boundary in that headerp pyou are also not actually sending any file data presumably you want to send the image filep precodeimport requests session requestssession headers refererhttpwwwtotextnet useragentmozilla50 windows nt 63 wow64 applewebkit53736 khtml like gecko chrome430235781 safari53736 with openimg0jpg rb as imgfile data action convert ocrlang eng docfile img0jpg imgfile imagejpeg r1 sessionposthttpwwwtotextnet filesdata headersheaders codepre psee the a hrefhttpdocspythonrequestsorgenlatestuserquickstartpostamultipartencodedfile relnofollowempost a multipartencoded fileem sectiona of the emquickstartem documentationp pyou may also have to send an initial codegetcode request to get a cookie set and there may still be other checks the server makes against the request headers that you havent yet provided youll have to experiment with those headers a server is free to respond any way they like based on the exact headers and request body you sendp

for double or triple bracket how can i remove all value in brackets

pyour question basically deals with removing text within nested brackets assuming only round or square brackets which would be closed properly you can use the following code as mentioned in this a hrefhttpstackoverflowcomquestions1965486removeallnestedblockswhilstleavingnonnestedblocksaloneviapythonquestionap precodeimport itertools def removebracketst p d 0 l for c in t if c or c d 1 lappendd if c or c d 1 for k g in itertoolsgroupbyzipt l lambda x x1gt0 b listg if maxd for c d in b gt 0 continue pappendjoinc for c d in b print joinp removebracketsstring codepre pif you just want to remove the text within single tags you can use coderegexcode for thisp precoderesult resubstring codepre

mysqldb to excel

pif you need a xlsx excel 2007 exporter you can use a hrefhttpsbitbucketorgericgazoniopenpyxl relnofollowopenpyxla otherwise a hrefhttppypipythonorgpypixlwt relnofollowxlwta is an optionp

how to run django runserver over tls 12

pif you have already tried to update openssl and python using brew and still does not work make sure your settings have debug false p pwatch this thread for more information a hrefhttpscodegooglecompgoogleappengineissuesdetailid13207 relnofollowhttpscodegooglecompgoogleappengineissuesdetailid13207ap

taking data from an xml document and writing it to another xml document with python

pyou can use the codeetwritecode and codexmldomminidomcode to achieve what you want considering we do not use codelxmlcode and use only standard pythons elementtreep pjust extending your codep precodeimport xmletreeelementtree as et import xmldomminidom docetparsetest2xml rootdocgetroot elementsrootfindallpoint rootetelementroot titleetsubelementroottitle titletexttitle tableetsubelementroottable for element in elements pointetsubelementtablepoint elemetsubelementpointid elemtextname elem2etsubelementpointlatitude elem2textcoords elem3etsubelementpointlongitude elem3textcoords etdumproot using etdump just to display the output in the python shell tree etelementtreeroot treewritetest3xml this is enough but not yet prettyprint using xmldomminidom to parse the nonpretty file to make it pretty a xmldomminidomparsetest3xml prettyxmlasstring atoprettyxml with opentest3xml w as f fwriteprettyxmlasstring write again in prettyprint format codepre

uwsgi procces blocks request

pyou have a uwsgi server configured to spawn 2 processes then you run 2 long requests those 2 processes are busy with the long requests so new requests must wait until the long requests finishp pif you want to send new reqeusts to the server while the long requests run increase the processes to more than 2 ie processes 4p

python beaver service not starting on rhel 70

pi figured the problem out this was because i was usingp precodeservice typenotify codepre ptypenotify identical to typesimple but with the stipulation that the daemon will send a signal to systemd when it is readyp pthis was not sending a signal though the service had startedp pfor more information a hrefhttpswikiarchlinuxorgindexphpsystemd relnofollowhttpswikiarchlinuxorgindexphpsystemdap

python request to google maps api handshake issue

pafter a long research i found out its a bug in cryptography modulep psee a hrefhttpsgithubcompycacryptographyissues2299 relnofollowhttpsgithubcompycacryptographyissues2299ap pworkaround place wsgiapplicationgroup globalp pin apache virtualhost configuration egp precodeltdirectory varwwwpathtowsgigt ltfiles wsgipygt require all granted ltfilesgt wsgiapplicationgroup global ltdirectorygt codepre

uwsgi webserver takes way too long to restart on prod

pgraceful reloads imply workers cooperation they get signal hup and they need to die into 60 secondsp pthere are various reason to block the procedurep ul liyou have overridden the hup signal handlerli liyour workers generate non daemon threadsli lia bug in your app is preventing the worker to correctly endli lili ul pyou could investigate about why your workers are blocked eventually strace them or simply be less merciful decreasing via workerreloadmercy option those 60 seconds to a lower valuep

trying to use opencv with python on mac os x 106

pi also had trouble getting the python opencv bindings to work with a macports opencv installationp pbut i got opencv installed on a mac using homebrew and i can codeimport cvcode and codeimport cv2code in python p pi a hrefhttpsgithubcommxclhomebrewwikiinstallation relnofollowinstalled homebrewa then did codebrew install opencvcode and then everything worked properlyp

sorting uniques in multiple lists

precodegtgtgt lines tupleopenvarlogfail2banlog r gtgtgt seen set gtgtgt for item in lines item itemstripn if fail2banactions in item and postfix in item and ban in item item itemsplit if item6 not in seen print item else seenadditem6 codepre