Both class and __init__ documentation are required when they shouldnt be

[Goldziher]

Hiya,

interrogate assumes I need to document both the class and its __init__ method. Yet this is not required by tooling usually and is actually considered an anti-pattern - the class constructor is equivalent to documenting the class and vice versa.

That is, the tool requires something like this:

class MyClass:
    """
    This is MyClass and it has a valid docstring.
    """
    def __init__(self, some_arg: int):
        """        
        Args:
            some_arg: an integer
        """
        ...

Whereas the two examples below are in fact correct documentation that raises errors currently:

class MyClass:
    def __init__(self, some_arg: int):
        """ 
            This is MyClass and it has a valid docstring.

            Args:
                some_arg: an integer
        """
        ...

OR:

class MyClass:
    """
    This is MyClass and it has a valid docstring.

    Args:
        some_arg: an integer
    """
    def __init__(self, some_arg: int):
        ...

There is a good exposition on this https://sphinxcontrib-napoleon.readthedocs.io/en/latest/example_google.html, which states:

    The __init__ method may be documented in either the class level
    docstring, or as a docstring on the __init__ method itself.

    Either form is acceptable, but the two should not be mixed. Choose one
    convention to document the __init__ method and be consistent with it.