/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

0 vote349 views3 answers
Spark to pandas
Python
0 vote342 views1 answer
Dictionary example of using zip()
Python
0 vote332 views1 answer
Mk virtual env
Python
0 vote376 views1 answer
Python how to get html code from url
Python
1 vote340 views1 answer
Use chrome console in selenium
Python
23 votes437 views6 answers
How to combine two lists in python
Python
0 vote323 views1 answer
How to pause a thread in python
Python
0 vote446 views1 answer
Circular import python
Python
2 votes381 views2 answers
Add hours to date time in python
Python
66 votes351 views6 answers
Python create folder
Python