What are the best practices for using decorators and mixins in Python?

What are the best practices for using decorators and mixins in Python?

When using decorators, ensure they are reusable and maintainable. For mixins, keep them focused and avoid deep inheritance.

Can you give an example of a good decorator?

Sure! A common example is a logging decorator that logs function calls. Here's a simple implementation:

import functools

def log_function_call(func):
    @functools.wraps(func)
    def wrapper(*args, **kwargs):
        print(f'Calling {func.__name__} with {args} and {kwargs}')
        return func(*args, **kwargs)
    return wrapper

What about mixins? How should I structure them?

Mixins should be small, focused classes that provide specific functionality. For example, a JsonResponseMixin could add JSON response capabilities to any class.

Are there any common pitfalls to avoid?

Yes, avoid using too many decorators on a single function, as it can make debugging difficult. Also, be cautious with mixin order of inheritance to prevent method resolution order issues.