/Python/Python enforcing class variables in subclass

Python enforcing class variables in subclass

class Foo:

    page_name = None
    author = None

    def __init_subclass__(cls, **kwargs):
        for required in ('page_name', 'author',):
            if not getattr(cls, required):
                raise TypeError(f"Can't instantiate abstract class {cls.__name__} without {required} attribute defined")
        return super().__init_subclass__(**kwargs)


class Bar(Foo):
    page_name = 'New Page'
    author = 'eric'

Source: stackoverflow.com

Similar codes

2 votes136 views1 answer
Pygame get screen width and height
Python
1 vote121 views1 answer
Acess nvidia from docker compose
Python
1 vote140 views1 answer
Python print no end of line
Python
0 vote125 views1 answer
Save image to file from URL
Python
2 votes134 views2 answers
How to call a specific item from a list python
Python
0 vote122 views1 answer
How to fix valueerror in python
Python
2 votes117 views1 answer
Python saving a screentshot with PIL
Python
0 vote114 views1 answer
Ad background image with tkinter
Python
0 vote165 views1 answer
Cant import flask mail
Python Flask
8 votes123 views2 answers
Python iterate backwards through list
Python