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 "
     
      ", line 1, in 
      
        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11 212 >>> string.find('c')  获得字符串的起始位置13 1014 >>> string[10]    第十个元素15 'c'16 >>> string.isalnum()   是否包含0-1A-Z，a-z17 False18 >>> string.isalpha()19 False20 >>> string.isdigit()是否仅包含字母21 False22 >>> string.islower()是否均为小写23 False24 >>> string.istitle()字符串中单词是否首字母大写25 False26 >>> 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 "
     
      ", line 1, in 
      
        9     A.join(string)10 NameError: name 'A' is not defined11 >>> '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 "
       
        ", line 1, in 
        
         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