Q:

Python isspace function

I'm having difficulty with the isspace function.  Any idea why my code is wrong and how to fix it? 
Here is the problem:
Implement the get_num_of_non_WS_characters() function. get_num_of_non_WS_characters() has a string parameter and returns the number of characters in the string, excluding all whitespace.
Here is my code: 
def get_num_of_non_WS_characters(s):

    count = 0
    for char in s: 
        if char.isspace():
            count = count + 1  
        return count

A:

You want non whitespace, so you should use not
def get_num_of_non_WS_characters(s):
    count = 0
    for char in s:
        if not char.isspace():
            count += 1
    return count

>>> get_num_of_non_WS_characters('hello')
5
>>> get_num_of_non_WS_characters('hello  ')
5

For completeness, this could be done more succinctly using a generator expression
def get_num_of_non_WS_characters(s):
    return sum(1 for char in s if not char.isspace())

