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I've changed attributes for other classes before without issues. _Element is obviously not a bu… Read more Really Weird... Can't Set Attributes Of Built-in/extension Type 'lxml.etree._element'

I have an existing class which inherits from the PyQT5 classes QWidget and Ui_Dialog. I want to use… Read more Mock A Pyqt Method

I'm working on a client library for a popular API. Currently, all of my unit tests of said clie… Read more How Do I Test An Api Client With Python?

I wrote a decorator that halts my program with breakpoint() if a critical error happens. def the_br… Read more How To Patch The Python 3 Breakpoint() Builtin?

Please help me understand why the following doesn't work. In particular - instance attributes o… Read more Mocking Instance Attributes

I am trying to mock a property of a class (@property decorator) and have bumped into this incorrect… Read more Python Propertymock Side Effect With Attributeerror And Valueerror

class HelloWorld(object): def say_it(self): return 'Hello I am Hello World' de… Read more Isinstance And Mocking

My code under test does sth like this: def to_be_tested(x): return round((x.a + x.b).c()) I woul… Read more Adding Mock Objects In Python