Write a function that counts the characters in a string the user inputs. Then write a routine that calls the function and displays the following output.

$ ./count_letters.py
Enter some words: The rain in Spain
The string "The rain in Spain" has 17 characters in it.

$ cat count_letters.py
#!/usr/bin/python
def countEm(my_string):
count = 0
for s in my_string:
count += 1
return count
stg = raw_input('Enter some words: ')
print 'The string \"' + stg + '\"' + ' has ',
print countEm(stg),
print 'characters in it.'