Mailman 3 November 2019 - code-quality

Howto tell pylint or astrooid that only one definition of class has to be loaded for specific python major versions (Python2 vs Python3)
by christoph＠out-world.com 26 Nov '19

26 Nov '19

Hi I do have a module which at least until next year has to be awave of some users who still use pyhton 2 eventhough not so far from now at end of life. For this i have a central module which deals with all the differences and ensures that base classes and basic classes exported by the module are independent of pyhton verison. All pyhton version specific stuff is handled by a single if sys.verision_info[0] >= 3: else: clause. The question i do have is how do i tell pylint or astroid respective that eiter the if or the else branche is relevant and that i can ignore the other. The cause of this question is that the module also contains a class which has dynamic attricutes, as it represents the DOM of binary data files. For smoe specific requirements this class in addition has a custom metaclass sepcified. As metaclass specification differs in Pyhton 2 and Pyhton 3 i have defined an empty parent class as follows if sys.version_info[0] >= 3: class ParentClass(object,metaclass=NodeMetaClass): pass else: class ParentClass(object): __metaclass__ = NodeMetaClass pass class Node(ParentClass): pass pylint will not report any no-member error on the Node class cause it thinks that the PraentClass object is ambigously defined. The method safe_infer retruns None. Is it possible via transform plugin module to make pylint or astroid ignore one of the two definitions or at least hide them from safe_infer method. So that no-member check is performed properly. Currently i have enabled all checks.

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Transoform aof class attribute node howto
by christoph＠out-world.com 24 Nov '19

24 Nov '19

Hi I have a class which represents a sort of DOM of a binary data file. Most of the attributes of each class instance depend upon the content and content structure of the file. 1) How can i tell Astroid that an Attribute represented by an Attribute node is existent. Or what kind of node (nodes) must the inference interator return in order that astroid or pylint respectiv concludes that the attribute is existing eventhough it could not infer it from the scoure code. 2) What is in addition needed in case the value of the attribute would be another instance of the DOM tree node class Are there any extensively document examples or howtos demonstrating how to do this For Example: ``` class Node(object): def __init__(self) : self.children = {} def add_child(self,name,child): self.children[name] = child if getattr(self.__class__,name,None) is None: def get_child(self): return self.children[name] setattr(self.__class__,name,property(get_child)) def main(): data_node = Node() sub_node = Node() data_node.add_child("first",sub_node) data_node.add_child("second",[1,2,3]) print(data_node.first) data_node.first.add_child("first_first","miau") print(data_node.first.first_first) if __name__ == "__main__": main() ``` How to tell astroid that first is a valid attribute and how to tell that first first of first is also a valid attribute.

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Instructing Pylint to find a module ?
by CrestChristopher 07 Nov '19

07 Nov '19

Hi, I'm hoping someone can help. I want to know what setting within the|.pylintrc| file is the correct setting for pylint to find a module for linting ? Thank You Christopher

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Python Code Quality Analyzer
by Muhammad Ali 03 Nov '19

03 Nov '19

Hi, I am CS Student currently working on my Project-Software Design Quality Analyzer so I want some help in this regard I want to compute Object-Oriented metrics and then have to detect various Object-Oriented Design smells. I want to know the list of python libraries that can be useful that I can use for this project. Any sort of help in this regard will be highly appreciated Thanks and Best Regards, Ali Jaffery

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