What are some effective debugging techniques for decorators in Python?

What are some effective debugging techniques for decorators in Python?

Debugging decorators can be tricky. One effective technique is to use print statements to trace the flow of execution.

Can you give me an example of how to use print statements in a decorator?

Sure! You can add a print statement inside the decorator function to log the arguments and the result. For example:

def my_decorator(func):
    def wrapper(*args, **kwargs):
        print(f'Calling {func.__name__} with args: {args} and kwargs: {kwargs}')
        result = func(*args, **kwargs)
        print(f'{func.__name__} returned: {result}')
        return result
    return wrapper

What if I want to debug a decorator that modifies the return value?

You can still use print statements! Just log the return value before returning it from the wrapper function. This way, you can see how the return value is being modified.