Need done in python, thanks. Write a function definition having one parameter, a string of any length. It returns True if all characters of the string are whitespace characters and False otherwise. Do...

Need done in python, thanks.

Write a function definition having one parameter, a string of any length. It returns True if all characters of the string are whitespace characters and False otherwise. Do not assume you have a built-in function that tests for whitespace or a pre-defined constant that contains whitespace.
An empty string should return False.   This function does NOT do any input from keyboard nor output to the screen.  Use ONE return statement.