python3.5变化（String）

import string

def letterCount(str):
count = 0
for s in str:
if s.lower()  in string.lowercase:
print()
count += 1
return count
question = "What is your name?"
print(letterCount(question))

string.lowercase

import string

def letterCount(str):
count = 0
for s in str:
if s.lower() in string.ascii_lowercase:
print()
count += 1
return count
question = "What  is your name?"
print(letterCount(question))