can you define __doc__ directly?

Question

I would like my docstring to be an f-string to put information on, but if I try to do that it isn't showed when you type foo.__doc__ or help(foo), so I tried the following:

used .format() which didn't register as a docstring

tried to do self.__doc__ = f"""...""", but it still didn't work:

def foo():
    self.__doc__ = f"""foo() is a function."""
    pass

I read on a site that it was possible to define the docstring without just putting a docstring at the beginning but it didn't say how.

How shall I start?

Answer 1

__doc__ is just an attribute. You can define it after defining your class / function / method :

def func():
    pass

func.__doc__ = f"My function doc using fstring"

class Myclass:

    def my_method():
        pass

    my_method.__doc__ = f"My method doc using string"

Myclass.__doc__ = f"My class doc using fstring"

Calling help() on either func, MyClass or my_method will display your string.