# VowelFraction.py
""" Given a string that is made up of upper and lower case
letters, blanks, and a single period, we show how to use
the string methods replace, lower, count, and find and the
function len to compute the fraction of letters that are vowels.
"""

s = 'The Quick Brown Fox Jumped Over The Lazy Dog'
print '\nInput string   = ',s
# Convert everything to lower case and remove the blanks.
s = s.lower()
s = s.replace(' ','')
# Compute the total number of letters and the total number of vowels
numLetters = len(s)
numVowels = s.count('a') + s.count('e') + s.count('i') + s.count('o') + s.count('u')
fraction = float(numVowels)/float(numLetters)
print 'Vowel fraction = %5.2f' %  fraction