Question

Python 请定义一个函数count(s, c),它检查字符串s中单个字符c出现的次数？

请定义一个函数count(s, c),它检查字符串s中单个字符c出现的次数，返回这个次数
用python

Answer 1

import string
def chartype(ch):
if ch in string.ascii_letters: return 'ascii_letters'
elif ch in string.digits: return 'digits'
elif ch in string.whitespace: return 'whitespace'
else: return 'other'

def iterchtypecount(s):
counter = {}
for c in s:
counter.setdefault(chartype(c), []).append(c)
for t, lst in counter.items():
yield t, len(lst)

for chtype, cnts in iterchtypecount(raw_input("Enter a string: ")):
print chtype, cnts