solution24.py

'''
Python has many built-in functions, and if you do not know how to use it, you can read document online or find some books. But Python has a built-in document function for every built-in functions.

Please write a program to print some Python built-in functions documents, such as abs(), int(), raw_input()

And add document for your own function
'''

print(abs.__doc__)
print(int.__doc__)
print(input.__doc__)


def my_func():
    '''
    This function demonstrates the use of docstring.
    '''
    return "This is a dummy function!"

print(my_func.__doc__)