小练习---统计字符串

题目：输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数。
利用 while 或 for 语句,条件为输入的字符不为 ' '。
实例

 1 import string
 2 s = raw_input('请输入一个字符串:
')
 3 letters = 0
 4 space = 0
 5 digit = 0
 6 others = 0
 7 i=0
 8 while i < len(s):
 9     c = s[i]
10     i += 1
11     if c.isalpha():
12         letters += 1
13     elif c.isspace():
14         space += 1
15     elif c.isdigit():
16         digit += 1
17     else:
18         others += 1
19 print 'char = %d,space = %d,digit = %d,others = %d' % (letters,space,digit,others)

结果

1 I'm a monster 1wan 2he 3ying !!!

2 char = 19,space = 6,digit = 3,others = 4

利用for循环实现
代码

 1 import string
 2 s = input("请输入一个字符串：
")
 3 letters = 0
 4 space = 0
 5 digit = 0
 6 others = 0
 7 for c in s:
 8     if c.isalpha():
 9         letters += 1
10     elif c.isspace():
11         space += 1
12     elif c.isdigit():
13         digit += 1
14     else:
15         others += 1
16 print("char = %d,space = %d,digit = %d,others = %d" % (letters,space,digit,others))

正是江南好风景