字符串的一些操作 

 1 >>> string="i am from china 323HELLOstudet"
 2 >>> string.capitalize()  将字符传第一个字母大写
 3 'I am from china 323hellostudet'
 4 >>> string.count()   
 5 
 6 Traceback (most recent call last):
 7   File "<pyshell#2>", line 1, in <module>
 8     string.count()
 9 TypeError: count() takes at least 1 argument (0 given)
10 >>> string.count('a')       获得字符串的数目
11 2
12 >>> string.find('c')  获得字符串的起始位置
13 10
14 >>> string[10]    第十个元素
15 'c'
16 >>> string.isalnum()   是否包含0-1A-Z，a-z
17 False
18 >>> string.isalpha()
19 False
20 >>> string.isdigit()是否仅包含字母
21 False
22 >>> string.islower()是否均为小写
23 False
24 >>> string.istitle()字符串中单词是否首字母大写
25 False
26 >>> string.isspace()  所有字符是否均为空白字符
27 False
 1 >>> string.isupper()    是否均为大写字母
 2 False
 3 >>> string.join('A')    
 4 'A'
 5 >>> A.join(string)
 6 
 7 Traceback (most recent call last):
 8   File "<pyshell#16>", line 1, in <module>
 9     A.join(string)
10 NameError: name 'A' is not defined
11 >>> 'A'.join(string)   连接字符串  *******
12 'iA AaAmA AfArAoAmA AcAhAiAnAaA A3A2A3AHAEALALAOAsAtAuAdAeAt'
13 >>> string.lower()    将字符串全部转换为小写
14 'i am from china 323hellostudet'
15 >>> string.split()    默认以空格分割
16 ['i', 'am', 'from', 'china', '323HELLOstudet']
17 >>> string.split('s')   以s分割
18 ['i am from china 323HELLO', 'tudet']
19 >>> string.swapcase()   将大写转换为小写，小写转换为大写
20 'I AM FROM CHINA 323helloSTUDET'
21 >>> string.title()     将字符串中单词首字母大写
22 'I Am From China 323Hellostudet'
23 >>> string.uper()      将全部字母转换为大写
24 
25 Traceback (most recent call last):
26   File "<pyshell#23>", line 1, in <module>
27     string.uper()
28 AttributeError: 'str' object has no attribute 'uper'
29 >>> string.upper()
30 'I AM FROM CHINA 323HELLOSTUDET'
31 >>> len(string)   字符串长度
32 30

 

posted @ 2017-04-20 14:52  Braveliberty  阅读(235)  评论(0)    收藏  举报