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def timing ( self , stat , delta , rate = 1 ) : if isinstance ( delta , timedelta ) : # Convert timedelta to number of milliseconds. delta = delta . total_seconds ( ) * 1000. self . _send_stat ( stat , '%0.6f|ms' % delta , rate )
Send new timing information .
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def decr ( self , stat , count = 1 , rate = 1 ) : self . incr ( stat , - count , rate )
Decrement a stat by count .
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def gauge ( self , stat , value , rate = 1 , delta = False ) : if value < 0 and not delta : if rate < 1 : if random . random ( ) > rate : return with self . pipeline ( ) as pipe : pipe . _send_stat ( stat , '0|g' , 1 ) pipe . _send_stat ( stat , '%s|g' % value , 1 ) else : prefix = '+' if delta and value >= 0 else '' s...
Set a gauge value .
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def set ( self , stat , value , rate = 1 ) : self . _send_stat ( stat , '%s|s' % value , rate )
Set a set value .
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def safe_wraps ( wrapper , * args , * * kwargs ) : while isinstance ( wrapper , functools . partial ) : wrapper = wrapper . func return functools . wraps ( wrapper , * args , * * kwargs )
Safely wraps partial functions .
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def find_rule_classes ( extra_path ) : files = [ ] modules = [ ] if os . path . isfile ( extra_path ) : files = [ os . path . basename ( extra_path ) ] directory = os . path . dirname ( extra_path ) elif os . path . isdir ( extra_path ) : files = os . listdir ( extra_path ) directory = extra_path else : raise UserRuleE...
Searches a given directory or python module for rule classes . This is done by adding the directory path to the python path importing the modules and then finding any Rule class in those modules .
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def ustr ( obj ) : if sys . version_info [ 0 ] == 2 : # If we are getting a string, then do an explicit decode # else, just call the unicode method of the object if type ( obj ) in [ str , basestring ] : # pragma: no cover # noqa return unicode ( obj , DEFAULT_ENCODING ) # pragma: no cover # noqa else : return unicode ...
Python 2 and 3 utility method that converts an obj to unicode in python 2 and to a str object in python 3
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def get_rule_option ( self , rule_name_or_id , option_name ) : option = self . _get_option ( rule_name_or_id , option_name ) return option . value
Returns the value of a given option for a given rule . LintConfigErrors will be raised if the rule or option don t exist .
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def set_rule_option ( self , rule_name_or_id , option_name , option_value ) : option = self . _get_option ( rule_name_or_id , option_name ) try : option . set ( option_value ) except options . RuleOptionError as e : msg = u"'{0}' is not a valid value for option '{1}.{2}'. {3}." raise LintConfigError ( msg . format ( op...
Attempts to set a given value for a given option for a given rule . LintConfigErrors will be raised if the rule or option don t exist or if the value is invalid .
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def set_from_config_file ( self , filename ) : if not os . path . exists ( filename ) : raise LintConfigError ( u"Invalid file path: {0}" . format ( filename ) ) self . _config_path = os . path . abspath ( filename ) try : parser = ConfigParser ( ) parser . read ( filename ) for section_name in parser . sections ( ) : ...
Loads lint config from a ini - style config file
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def build ( self , config = None ) : # If we are passed a config object, then rebuild that object instead of building a new lintconfig object from # scratch if not config : config = LintConfig ( ) config . _config_path = self . _config_path # Set general options first as this might change the behavior or validity of th...
Build a real LintConfig object by normalizing and validating the options that were previously set on this factory .
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def clone ( self ) : builder = LintConfigBuilder ( ) builder . _config_blueprint = copy . deepcopy ( self . _config_blueprint ) builder . _config_path = self . _config_path return builder
Creates an exact copy of a LintConfigBuilder .
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def _git ( * command_parts , * * kwargs ) : # Special arguments passed to sh: http://amoffat.github.io/sh/special_arguments.html git_kwargs = { '_tty_out' : False } git_kwargs . update ( kwargs ) try : result = sh . git ( * command_parts , * * git_kwargs ) # pylint: disable=unexpected-keyword-arg # If we reach this poi...
Convenience function for running git commands . Automatically deals with exceptions and unicode .
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def git_commentchar ( ) : commentchar = _git ( "config" , "--get" , "core.commentchar" , _ok_code = [ 1 ] ) # git will return an exit code of 1 if it can't find a config value, in this case we fall-back to # as commentchar if hasattr ( commentchar , 'exit_code' ) and commentchar . exit_code == 1 : # pylint: disable=no-...
Shortcut for retrieving comment char from git config
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def from_full_message ( commit_msg_str ) : all_lines = commit_msg_str . splitlines ( ) try : cutline_index = all_lines . index ( GitCommitMessage . CUTLINE ) except ValueError : cutline_index = None lines = [ line for line in all_lines [ : cutline_index ] if not line . startswith ( GitCommitMessage . COMMENT_CHAR ) ] f...
Parses a full git commit message by parsing a given string into the different parts of a commit message
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def should_ignore_rule ( self , rule ) : return rule . id in self . config . ignore or rule . name in self . config . ignore
Determines whether a rule should be ignored based on the general list of commits to ignore
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def _apply_line_rules ( lines , commit , rules , line_nr_start ) : all_violations = [ ] line_nr = line_nr_start for line in lines : for rule in rules : violations = rule . validate ( line , commit ) if violations : for violation in violations : violation . line_nr = line_nr all_violations . append ( violation ) line_nr...
Iterates over the lines in a given list of lines and validates a given list of rules against each line
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def _apply_commit_rules ( rules , commit ) : all_violations = [ ] for rule in rules : violations = rule . validate ( commit ) if violations : all_violations . extend ( violations ) return all_violations
Applies a set of rules against a given commit and gitcontext
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def lint ( self , commit ) : LOG . debug ( "Linting commit %s" , commit . sha or "[SHA UNKNOWN]" ) LOG . debug ( "Commit Object\n" + ustr ( commit ) ) # Apply config rules for rule in self . configuration_rules : rule . apply ( self . config , commit ) # Skip linting if this is a special commit type that is configured ...
Lint the last commit in a given git context by applying all ignore title body and commit rules .
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def print_violations ( self , violations ) : for v in violations : line_nr = v . line_nr if v . line_nr else "-" self . display . e ( u"{0}: {1}" . format ( line_nr , v . rule_id ) , exact = True ) self . display . ee ( u"{0}: {1} {2}" . format ( line_nr , v . rule_id , v . message ) , exact = True ) if v . content : s...
Print a given set of violations to the standard error output
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def _output ( self , message , verbosity , exact , stream ) : if exact : if self . config . verbosity == verbosity : stream . write ( message + "\n" ) else : if self . config . verbosity >= verbosity : stream . write ( message + "\n" )
Output a message if the config s verbosity is > = to the given verbosity . If exact == True the message will only be outputted if the given verbosity exactly matches the config s verbosity .
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def setup_logging ( ) : root_log = logging . getLogger ( "gitlint" ) root_log . propagate = False # Don't propagate to child loggers, the gitlint root logger handles everything handler = logging . StreamHandler ( ) formatter = logging . Formatter ( LOG_FORMAT ) handler . setFormatter ( formatter ) root_log . addHandler...
Setup gitlint logging
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def build_config ( ctx , target , config_path , c , extra_path , ignore , verbose , silent , debug ) : config_builder = LintConfigBuilder ( ) try : # Config precedence: # First, load default config or config from configfile if config_path : config_builder . set_from_config_file ( config_path ) elif os . path . exists (...
Creates a LintConfig object based on a set of commandline parameters .
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def get_stdin_data ( ) : # STDIN can only be 3 different types of things ("modes") # 1. An interactive terminal device (i.e. a TTY -> sys.stdin.isatty() or stat.S_ISCHR) # 2. A (named) pipe (stat.S_ISFIFO) # 3. A regular file (stat.S_ISREG) # Technically, STDIN can also be other device type like a named unix socket (st...
Helper function that returns data send to stdin or False if nothing is send
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def cli ( # pylint: disable=too-many-arguments ctx , target , config , c , commits , extra_path , ignore , msg_filename , verbose , silent , debug , ) : try : if debug : logging . getLogger ( "gitlint" ) . setLevel ( logging . DEBUG ) log_system_info ( ) # Get the lint config from the commandline parameters and # store...
Git lint tool checks your git commit messages for styling issues
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def install_hook ( ctx ) : try : lint_config = ctx . obj [ 0 ] hooks . GitHookInstaller . install_commit_msg_hook ( lint_config ) # declare victory :-) hook_path = hooks . GitHookInstaller . commit_msg_hook_path ( lint_config ) click . echo ( u"Successfully installed gitlint commit-msg hook in {0}" . format ( hook_path...
Install gitlint as a git commit - msg hook .
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def uninstall_hook ( ctx ) : try : lint_config = ctx . obj [ 0 ] hooks . GitHookInstaller . uninstall_commit_msg_hook ( lint_config ) # declare victory :-) hook_path = hooks . GitHookInstaller . commit_msg_hook_path ( lint_config ) click . echo ( u"Successfully uninstalled gitlint commit-msg hook from {0}" . format ( h...
Uninstall gitlint commit - msg hook .
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def generate_config ( ctx ) : path = click . prompt ( 'Please specify a location for the sample gitlint config file' , default = DEFAULT_CONFIG_FILE ) path = os . path . abspath ( path ) dir_name = os . path . dirname ( path ) if not os . path . exists ( dir_name ) : click . echo ( u"Error: Directory '{0}' does not exi...
Generates a sample gitlint config file .
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def _assert_git_repo ( target ) : hooks_dir = os . path . abspath ( os . path . join ( target , HOOKS_DIR_PATH ) ) if not os . path . isdir ( hooks_dir ) : raise GitHookInstallerError ( u"{0} is not a git repository." . format ( target ) )
Asserts that a given target directory is a git repository
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def get_job_url ( config , hub , group , project ) : if ( ( config is not None ) and ( 'hub' in config ) and ( hub is None ) ) : hub = config [ "hub" ] if ( ( config is not None ) and ( 'group' in config ) and ( group is None ) ) : group = config [ "group" ] if ( ( config is not None ) and ( 'project' in config ) and (...
Util method to get job url
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def get_backend_stats_url ( config , hub , backend_type ) : if ( ( config is not None ) and ( 'hub' in config ) and ( hub is None ) ) : hub = config [ "hub" ] if ( hub is not None ) : return '/Network/{}/devices/{}' . format ( hub , backend_type ) return '/Backends/{}' . format ( backend_type )
Util method to get backend stats url
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def get_backend_url ( config , hub , group , project ) : if ( ( config is not None ) and ( 'hub' in config ) and ( hub is None ) ) : hub = config [ "hub" ] if ( ( config is not None ) and ( 'group' in config ) and ( group is None ) ) : group = config [ "group" ] if ( ( config is not None ) and ( 'project' in config ) a...
Util method to get backend url
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def obtain_token ( self , config = None ) : client_application = CLIENT_APPLICATION if self . config and ( "client_application" in self . config ) : client_application += ':' + self . config [ "client_application" ] headers = { 'x-qx-client-application' : client_application } if self . token_unique : try : response = r...
Obtain the token to access to QX Platform .
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def check_token ( self , respond ) : if respond . status_code == 401 : self . credential . obtain_token ( config = self . config ) return False return True
Check is the user s token is valid
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def post ( self , path , params = '' , data = None ) : self . result = None data = data or { } headers = { 'Content-Type' : 'application/json' , 'x-qx-client-application' : self . client_application } url = str ( self . credential . config [ 'url' ] + path + '?access_token=' + self . credential . get_token ( ) + params...
POST Method Wrapper of the REST API
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def _parse_response ( self , respond ) : # convert error messages into exceptions mobj = self . _max_qubit_error_re . match ( respond . text ) if mobj : raise RegisterSizeError ( 'device register size must be <= {}' . format ( mobj . group ( 1 ) ) ) return True
parse text of response for HTTP errors
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def _check_backend ( self , backend , endpoint ) : # First check against hacks for old backend names original_backend = backend backend = backend . lower ( ) if endpoint == 'experiment' : if backend in self . __names_backend_ibmqxv2 : return 'real' elif backend in self . __names_backend_ibmqxv3 : return 'ibmqx3' elif b...
Check if the name of a backend is valid to run in QX Platform
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def get_execution ( self , id_execution , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials invalid' ) execution = self...
Get a execution by its id
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def get_result_from_execution ( self , id_execution , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials invalid' ) exec...
Get the result of a execution by the execution id
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def get_code ( self , id_code , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials invalid' ) code = self . req . get ( ...
Get a code by its id
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def get_image_code ( self , id_code , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials invalid' ) return self . req . ...
Get the image of a code by its id
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def get_last_codes ( self , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials invalid' ) last = '/users/' + self . req ...
Get the last codes of the user
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def run_job ( self , job , backend = 'simulator' , shots = 1 , max_credits = None , seed = None , hub = None , group = None , project = None , hpc = None , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id (...
Execute a job
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def get_job ( self , id_job , hub = None , group = None , project = None , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : respond = { } respond [ "status"...
Get the information about a job by its id
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def get_jobs ( self , limit = 10 , skip = 0 , backend = None , only_completed = False , filter = None , hub = None , group = None , project = None , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_i...
Get the information about the user jobs
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def get_status_job ( self , id_job , hub = None , group = None , project = None , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : respond = { } respond [ "...
Get the status about a job by its id
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def cancel_job ( self , id_job , hub = None , group = None , project = None , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : respond = { } respond [ "stat...
Cancel the information about a job by its id
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def backend_status ( self , backend = 'ibmqx4' , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) backend_type = self . _check_backend ( backend , 'status' ) if not backend_type : raise BadBacke...
Get the status of a chip
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def backend_calibration ( self , backend = 'ibmqx4' , hub = None , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials in...
Get the calibration of a real chip
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def available_backends ( self , hub = None , group = None , project = None , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'cred...
Get the backends available to use in the QX Platform
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def available_backend_simulators ( self , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials invalid' ) else : ret = sel...
Get the backend simulators available to use in the QX Platform
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def get_my_credits ( self , access_token = None , user_id = None ) : if access_token : self . req . credential . set_token ( access_token ) if user_id : self . req . credential . set_user_id ( user_id ) if not self . check_credentials ( ) : raise CredentialsError ( 'credentials invalid' ) else : user_data_url = '/users...
Get the credits by user to use in the QX Platform
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def trace ( self , predicate ) : self . _handler = predicate if self . threading_support is None or self . threading_support : self . _threading_previous = getattr ( threading , '_trace_hook' , None ) threading . settrace ( self ) self . _previous = sys . gettrace ( ) sys . settrace ( self ) return self
Starts tracing with the given callable .
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def And ( * predicates , * * kwargs ) : if kwargs : predicates += Query ( * * kwargs ) , return _flatten ( _And , * predicates )
And predicate . Returns False at the first sub - predicate that returns False .
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def Or ( * predicates , * * kwargs ) : if kwargs : predicates += tuple ( Query ( * * { k : v } ) for k , v in kwargs . items ( ) ) return _flatten ( _Or , * predicates )
Or predicate . Returns True at the first sub - predicate that returns True .
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def wrap ( function_to_trace = None , * * trace_options ) : def tracing_decorator ( func ) : @ functools . wraps ( func ) def tracing_wrapper ( * args , * * kwargs ) : predicates = [ ] local = trace_options . pop ( 'local' , False ) if local : predicates . append ( Q ( depth_lt = 2 ) ) predicates . append ( ~ When ( Q ...
Functions decorated with this will be traced .
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def threadid ( self ) : current = self . thread . ident main = get_main_thread ( ) if main is None : return current else : return current if current != main . ident else None
Current thread ident . If current thread is main thread then it returns None .
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def filename ( self , exists = os . path . exists , cython_suffix_re = CYTHON_SUFFIX_RE ) : filename = self . frame . f_globals . get ( '__file__' , '' ) if filename is None : filename = '' if filename . endswith ( ( '.pyc' , '.pyo' ) ) : filename = filename [ : - 1 ] elif filename . endswith ( '$py.class' ) : # Jython...
A string with absolute path to file .
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def stdlib ( self ) : if self . module == 'pkg_resources' or self . module . startswith ( 'pkg_resources.' ) : return False elif self . filename . startswith ( SITE_PACKAGES_PATHS ) : # if it's in site-packages then its definitely not stdlib return False elif self . filename . startswith ( SYS_PREFIX_PATHS ) : return T...
A boolean flag . True if frame is in stdlib .
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def _iter_symbols ( code ) : for node in ast . walk ( ast . parse ( code ) ) : if isinstance ( node , ast . Name ) : yield node . id
Iterate all the variable names in the given expression .
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def __make_request_url ( self , teststep_dict , entry_json ) : request_params = utils . convert_list_to_dict ( entry_json [ "request" ] . get ( "queryString" , [ ] ) ) url = entry_json [ "request" ] . get ( "url" ) if not url : logging . exception ( "url missed in request." ) sys . exit ( 1 ) parsed_object = urlparse ....
parse HAR entry request url and queryString and make teststep url and params
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def __make_request_method ( self , teststep_dict , entry_json ) : method = entry_json [ "request" ] . get ( "method" ) if not method : logging . exception ( "method missed in request." ) sys . exit ( 1 ) teststep_dict [ "request" ] [ "method" ] = method
parse HAR entry request method and make teststep method .
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def __make_request_headers ( self , teststep_dict , entry_json ) : teststep_headers = { } for header in entry_json [ "request" ] . get ( "headers" , [ ] ) : if header [ "name" ] . lower ( ) in IGNORE_REQUEST_HEADERS : continue teststep_headers [ header [ "name" ] ] = header [ "value" ] if teststep_headers : teststep_di...
parse HAR entry request headers and make teststep headers . header in IGNORE_REQUEST_HEADERS will be ignored .
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def _make_request_data ( self , teststep_dict , entry_json ) : method = entry_json [ "request" ] . get ( "method" ) if method in [ "POST" , "PUT" , "PATCH" ] : postData = entry_json [ "request" ] . get ( "postData" , { } ) mimeType = postData . get ( "mimeType" ) # Note that text and params fields are mutually exclusiv...
parse HAR entry request data and make teststep request data
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def _make_validate ( self , teststep_dict , entry_json ) : teststep_dict [ "validate" ] . append ( { "eq" : [ "status_code" , entry_json [ "response" ] . get ( "status" ) ] } ) resp_content_dict = entry_json [ "response" ] . get ( "content" ) headers_mapping = utils . convert_list_to_dict ( entry_json [ "response" ] . ...
parse HAR entry response and make teststep validate .
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def load_har_log_entries ( file_path ) : with io . open ( file_path , "r+" , encoding = "utf-8-sig" ) as f : try : content_json = json . loads ( f . read ( ) ) return content_json [ "log" ] [ "entries" ] except ( KeyError , TypeError ) : logging . error ( "HAR file content error: {}" . format ( file_path ) ) sys . exit...
load HAR file and return log entries list
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def x_www_form_urlencoded ( post_data ) : if isinstance ( post_data , dict ) : return "&" . join ( [ u"{}={}" . format ( key , value ) for key , value in post_data . items ( ) ] ) else : return post_data
convert origin dict to x - www - form - urlencoded
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def convert_x_www_form_urlencoded_to_dict ( post_data ) : if isinstance ( post_data , str ) : converted_dict = { } for k_v in post_data . split ( "&" ) : try : key , value = k_v . split ( "=" ) except ValueError : raise Exception ( "Invalid x_www_form_urlencoded data format: {}" . format ( post_data ) ) converted_dict ...
convert x_www_form_urlencoded data to dict
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def dump_yaml ( testcase , yaml_file ) : logging . info ( "dump testcase to YAML format." ) with io . open ( yaml_file , 'w' , encoding = "utf-8" ) as outfile : yaml . dump ( testcase , outfile , allow_unicode = True , default_flow_style = False , indent = 4 ) logging . info ( "Generate YAML testcase successfully: {}" ...
dump HAR entries to yaml testcase
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def dump_json ( testcase , json_file ) : logging . info ( "dump testcase to JSON format." ) with io . open ( json_file , 'w' , encoding = "utf-8" ) as outfile : my_json_str = json . dumps ( testcase , ensure_ascii = ensure_ascii , indent = 4 ) if isinstance ( my_json_str , bytes ) : my_json_str = my_json_str . decode (...
dump HAR entries to json testcase
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def prepare_request ( self , request ) : try : request_id = local . request_id except AttributeError : request_id = NO_REQUEST_ID if self . request_id_header and request_id != NO_REQUEST_ID : request . headers [ self . request_id_header ] = request_id return super ( Session , self ) . prepare_request ( request )
Include the request ID if available in the outgoing request
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def _get ( self , url , params = None , headers = None ) : url = self . clean_url ( url ) response = requests . get ( url , params = params , verify = self . verify , timeout = self . timeout , headers = headers ) return response
Wraps a GET request with a url check
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def _post ( self , url , data = None , json = None , params = None , headers = None ) : url = self . clean_url ( url ) response = requests . post ( url , data = data , json = json , params = params , headers = headers , timeout = self . timeout , verify = self . verify ) return response
Wraps a POST request with a url check
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def expand ( self , url ) : url = self . clean_url ( url ) response = self . _get ( url ) if response . ok : return response . url raise ExpandingErrorException
Base expand method . Only visits the link and return the response url
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def clean_url ( url ) : if not url . startswith ( ( 'http://' , 'https://' ) ) : url = f'http://{url}' if not URL_RE . match ( url ) : raise BadURLException ( f'{url} is not valid' ) return url
URL Validation function
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def create_function_from_request_pdu ( pdu ) : function_code = get_function_code_from_request_pdu ( pdu ) try : function_class = function_code_to_function_map [ function_code ] except KeyError : raise IllegalFunctionError ( function_code ) return function_class . create_from_request_pdu ( pdu )
Return function instance based on request PDU .
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def request_pdu ( self ) : if None in [ self . starting_address , self . quantity ] : # TODO Raise proper exception. raise Exception return struct . pack ( '>BHH' , self . function_code , self . starting_address , self . quantity )
Build request PDU to read coils .
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def request_pdu ( self ) : if None in [ self . address , self . value ] : # TODO Raise proper exception. raise Exception return struct . pack ( '>BHH' , self . function_code , self . address , self . _value )
Build request PDU to write single coil .
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def value ( self , value ) : try : struct . pack ( '>' + conf . TYPE_CHAR , value ) except struct . error : raise IllegalDataValueError self . _value = value
Value to be written on register .
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def request_pdu ( self ) : if None in [ self . address , self . value ] : # TODO Raise proper exception. raise Exception return struct . pack ( '>BH' + conf . TYPE_CHAR , self . function_code , self . address , self . value )
Build request PDU to write single register .
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def serve_forever ( self , poll_interval = 0.5 ) : self . serial_port . timeout = poll_interval while not self . _shutdown_request : try : self . serve_once ( ) except ( CRCError , struct . error ) as e : log . error ( 'Can\'t handle request: {0}' . format ( e ) ) except ( SerialTimeoutException , ValueError ) : pass
Wait for incomming requests .
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def execute_route ( self , meta_data , request_pdu ) : try : function = create_function_from_request_pdu ( request_pdu ) results = function . execute ( meta_data [ 'unit_id' ] , self . route_map ) try : # ReadFunction's use results of callbacks to build response # PDU... return function . create_response_pdu ( results ...
Execute configured route based on requests meta data and request PDU .
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def serial_port ( self , serial_port ) : char_size = get_char_size ( serial_port . baudrate ) # See docstring of get_char_size() for meaning of constants below. serial_port . inter_byte_timeout = 1.5 * char_size serial_port . timeout = 3.5 * char_size self . _serial_port = serial_port
Set timeouts on serial port based on baudrate to detect frames .
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def serve_once ( self ) : # 256 is the maximum size of a Modbus RTU frame. request_adu = self . serial_port . read ( 256 ) log . debug ( '<-- {0}' . format ( hexlify ( request_adu ) ) ) if len ( request_adu ) == 0 : raise ValueError response_adu = self . process ( request_adu ) self . respond ( response_adu )
Listen and handle 1 request .
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def generate_look_up_table ( ) : poly = 0xA001 table = [ ] for index in range ( 256 ) : data = index << 1 crc = 0 for _ in range ( 8 , 0 , - 1 ) : data >>= 1 if ( data ^ crc ) & 0x0001 : crc = ( crc >> 1 ) ^ poly else : crc >>= 1 table . append ( crc ) return table
Generate look up table .
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def get_crc ( msg ) : register = 0xFFFF for byte_ in msg : try : val = struct . unpack ( '<B' , byte_ ) [ 0 ] # Iterating over a bit-like objects in Python 3 gets you ints. # Because fuck logic. except TypeError : val = byte_ register = ( register >> 8 ) ^ look_up_table [ ( register ^ val ) & 0xFF ] # CRC is little-end...
Return CRC of 2 byte for message .
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def validate_crc ( msg ) : if not struct . unpack ( '<H' , get_crc ( msg [ : - 2 ] ) ) == struct . unpack ( '<H' , msg [ - 2 : ] ) : raise CRCError ( 'CRC validation failed.' )
Validate CRC of message .
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def _create_request_adu ( slave_id , req_pdu ) : first_part_adu = struct . pack ( '>B' , slave_id ) + req_pdu return first_part_adu + get_crc ( first_part_adu )
Return request ADU for Modbus RTU .
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def send_message ( adu , serial_port ) : serial_port . write ( adu ) serial_port . flush ( ) # Check exception ADU (which is shorter than all other responses) first. exception_adu_size = 5 response_error_adu = recv_exactly ( serial_port . read , exception_adu_size ) raise_for_exception_adu ( response_error_adu ) expect...
Send ADU over serial to to server and return parsed response .
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def pack_mbap ( transaction_id , protocol_id , length , unit_id ) : return struct . pack ( '>HHHB' , transaction_id , protocol_id , length , unit_id )
Create and return response MBAP .
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def memoize ( f ) : cache = { } @ wraps ( f ) def inner ( arg ) : if arg not in cache : cache [ arg ] = f ( arg ) return cache [ arg ] return inner
Decorator which caches function s return value each it is called . If called later with same arguments the cached value is returned .
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def recv_exactly ( recv_fn , size ) : recv_bytes = 0 chunks = [ ] while recv_bytes < size : chunk = recv_fn ( size - recv_bytes ) if len ( chunk ) == 0 : # when closed or empty break recv_bytes += len ( chunk ) chunks . append ( chunk ) response = b'' . join ( chunks ) if len ( response ) != size : raise ValueError ret...
Use the function to read and return exactly number of bytes desired .
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def _create_mbap_header ( slave_id , pdu ) : # 65535 = (2**16)-1 aka maximum number that fits in 2 bytes. transaction_id = randint ( 0 , 65535 ) length = len ( pdu ) + 1 return struct . pack ( '>HHHB' , transaction_id , 0 , length , slave_id )
Return byte array with MBAP header for PDU .
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def send_message ( adu , sock ) : sock . sendall ( adu ) # Check exception ADU (which is shorter than all other responses) first. exception_adu_size = 9 response_error_adu = recv_exactly ( sock . recv , exception_adu_size ) raise_for_exception_adu ( response_error_adu ) expected_response_size = expected_response_pdu_si...
Send ADU over socket to to server and return parsed response .
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def get_serial_port ( ) : port = Serial ( port = '/dev/ttyS1' , baudrate = 9600 , parity = PARITY_NONE , stopbits = 1 , bytesize = 8 , timeout = 1 ) fh = port . fileno ( ) # A struct with configuration for serial port. serial_rs485 = struct . pack ( 'hhhhhhhh' , 1 , 0 , 0 , 0 , 0 , 0 , 0 , 0 ) fcntl . ioctl ( fh , 0x54...
Return serial . Serial instance ready to use for RS485 .
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def _set_multi_bit_value_format_character ( self ) : self . MULTI_BIT_VALUE_FORMAT_CHARACTER = self . MULTI_BIT_VALUE_FORMAT_CHARACTER . upper ( ) if self . SIGNED_VALUES : self . MULTI_BIT_VALUE_FORMAT_CHARACTER = self . MULTI_BIT_VALUE_FORMAT_CHARACTER . lower ( )
Set format character for multibit values .
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def get_filename4code ( module , content , ext = None ) : imagedir = module + "-images" fn = hashlib . sha1 ( content . encode ( sys . getfilesystemencoding ( ) ) ) . hexdigest ( ) try : os . mkdir ( imagedir ) sys . stderr . write ( 'Created directory ' + imagedir + '\n' ) except OSError : pass if ext : fn += "." + ex...
Generate filename based on content
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def toJSONFilters ( actions ) : try : input_stream = io . TextIOWrapper ( sys . stdin . buffer , encoding = 'utf-8' ) except AttributeError : # Python 2 does not have sys.stdin.buffer. # REF: https://stackoverflow.com/questions/2467928/python-unicodeencode input_stream = codecs . getreader ( "utf-8" ) ( sys . stdin ) s...
Generate a JSON - to - JSON filter from stdin to stdout
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def applyJSONFilters ( actions , source , format = "" ) : doc = json . loads ( source ) if 'meta' in doc : meta = doc [ 'meta' ] elif doc [ 0 ] : # old API meta = doc [ 0 ] [ 'unMeta' ] else : meta = { } altered = doc for action in actions : altered = walk ( altered , action , format , meta ) return json . dumps ( alte...
Walk through JSON structure and apply filters
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def stringify ( x ) : result = [ ] def go ( key , val , format , meta ) : if key in [ 'Str' , 'MetaString' ] : result . append ( val ) elif key == 'Code' : result . append ( val [ 1 ] ) elif key == 'Math' : result . append ( val [ 1 ] ) elif key == 'LineBreak' : result . append ( " " ) elif key == 'SoftBreak' : result ...
Walks the tree x and returns concatenated string content leaving out all formatting .
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