Package: handyobj
HandyObjInstallationpipinstallhandyobjWhy you might consider using this package ?In javascript when you work with arrays, you can do some chaining operation in a functional programming style like :jsList=[1,2,3,4]console.log(jsList.map(el=>el*2))>>>[2,4,6,8]jsList=[1,2,3,4]console.log(jsList.filter(el=>el%2==0).map(el=>el+1))[3,5]Python offersfunctoolsmodule withmapandfilterbut they are not as handy
as in javascript when we want to chain them in FP style.This is why i'm proposing this package that offers 2 objects,SmartListthat act as a simple wrapper on standard list and offers methods like
(map,sort, filter_by_redicates, filter_by_val_attributes etc...) andObjectDictthat
act as a wrapper on a normal dict, and allow access to it's
values directly as if they were attributes of the object (works also with nested dict).SoSmartListused in combination withObjectDictoffers you the same
experience as you would have in javascript. In some scenarios i found this
pattern really handy to extract the data i want from 3rd party
apis when they were not granular enough.Usage# Condider we have the following data list of dictldict=[{'name':'Kenneth Thomas','job':'Broadcast presenter','company':'Williams-Miller'},{'name':'Edward Hamilton','job':'Quarry manager','company':'Anderson-Kline'},{'name':'Brandon Weeks','job':'Theme park manager','company':'Williams, Garcia and Allen'},{'name':'Kim Little','job':'Insurance risk surveyor','company':'Frank-Hutchinson'},{'name':'David Gutierrez','job':'Community pharmacist','company':'Allen, Herman and Ellis'},{'name':'Matthew Cook','job':'Chief Operating Officer','company':'Hansen-Young'},{'name':'Mark Watson','job':'Doctor, general practice','company':'Vargas PLC'},{'name':'Jessica Ellis','job':'Tourist information centre manager','company':'Williams-Reeves'},{'name':'Jessica Duncan','job':'Administrator, Civil Service','company':'Hobbs Group'},{'name':'Diana Butler','job':'Scientist, research (maths)','company':'Olsen, Maddox and Smith'}]# Now consider we want extract just people that work as managers, here is how i dofromhandyobjimportSmartList,ObjectDictmanagers=SmartList(ldict).\map(lambdael:ObjectDict(el)).\filter_by_predicates(lambdael:"manager"inel.job.lower())>>>[{'name':'Edward Hamilton','job':'Quarry manager','company':'Anderson-Kline'},{'name':'Brandon Weeks','job':'Theme park manager','company':'Williams, Garcia and Allen'},{'name':'Jessica Ellis','job':'Tourist information centre manager','company':'Williams-Reeves'}]# There are more things you can do with the methods of smart list, like aggregation by predicates, or check attribute equality or pattern matching :# len -> gives you lenght of your list# map -> map your list to a new list# first -> give you first element of list (index error if doesnt exist)# last -> give you last element of list (index error if doesnt exist)# last_or_none  -> give you last element of list (None if doesn't exist)# first_or_none  -> give you first element of list (None if doesn't exist)# one_or_none -> one element or None otherwise# sort -> sort your list to a new list# filter_by_predicates -> filter by predicates (functions that return true or false)# filter_by_attribute_values -> filter by keyword attribute values()# filter_by_matched_attributes -> filter by keyword patterns values()# group_by_labeled_predicates -> group by [(label, predicate)], you obtain a SmartList of tuples [(label, filtered_smart_list)]