How can I debug decorators in Python?

How can I debug decorators in Python?

Debugging decorators can be tricky. You can start by adding print statements inside the decorator to trace execution.

What if I want to see the arguments passed to the decorated function?

You can modify the decorator to print the arguments before calling the function. Here's an example:

def my_decorator(func):
    def wrapper(*args, **kwargs):
        print(f'Arguments: {args}, {kwargs}')
        return func(*args, **kwargs)
    return wrapper

Are there any tools that can help with debugging decorators?

Yes, you can use tools like pdb for step-by-step debugging or logging for more structured output.

Can you show me a complete example of a decorator with debugging?

Sure! Here's a complete example:

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

@debug_decorator
def add(a, b):
    return a + b