Preserving docstrings when decorating functions
Your friend has come to you with a problem. They've written some nifty decorators and added them to the functions in the open-source library they've been working on. However, they were running some tests and discovered that all of the docstrings have mysteriously disappeared from their decorated functions. Show your friend how to preserve docstrings and other metadata when writing decorators.
This exercise is part of the course
Writing Functions in Python
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
def add_hello(func):
def wrapper(*args, **kwargs):
print('Hello')
return func(*args, **kwargs)
return wrapper
# Decorate print_sum() with the add_hello() decorator
____
def print_sum(a, b):
"""Adds two numbers and prints the sum"""
print(a + b)
print_sum(10, 20)
# Define the docstring
print_sum_docstring = print_sum.____
print(print_sum_docstring)