Write a function that counts the vowels (aeiou) in a string the user inputs. Make sure it counts upper- and lowercase vowels. Then write a routine that calls the function and displays the following output.

$ ./count_vowels.py
Enter some words: Go East young man!
The string "Go East young man!" has 6 vowels in it.

$ cat count_vowels.py
#!/usr/bin/python
def countVowels(my_string):
count = 0
for s in my_string:
if s.lower() in 'aeiou':
count += 1
return count
stg = raw_input('Enter some words: ')
print 'The string \"' + stg + '\"' + ' has ',
print countVowels(stg),
print 'vowels in it.'
Following is an alternative function that performs the same task:
$ cat count_vowels2.py
#!/usr/bin/python
def countVowels(my_string):
my_string = my_string.lower()
return len(my_string) - len(my_string.translate(None,'aeiou'))
stg = raw_input('Enter some words: ')
print 'The string \"' + stg + '\"' + ' has ',
print countVowels(stg),
print 'vowels in it.'