>>>dir(str)

['__add__','__class__', '__contains__', '__delattr__', '__doc__', '__eq__',

format__','__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__

slice__','__gt__', '__hash__', '__init__', '__le__', '__len__', '__lt__', '_

d__', '__mul__','__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr_

 '__rmod__', '__rmul__', '__setattr__','__sizeof__', '__str__', '__subclassh

__','_formatter_field_name_split', '_formatter_parser', 'capitalize', 'cente

 'count', 'decode', 'encode', 'endswith','expandtabs', 'find', 'format', 'in

', 'isalnum','isalpha', 'isdigit', 'islower', 'isspace', 'istitle', 'isupper

'join', 'ljust','lower', 'lstrip', 'partition', 'replace', 'rfind', 'rindex'

rjust','rpartition', 'rsplit', 'rstrip', 'split', 'splitlines', 'startswith'

strip','swapcase', 'title', 'translate', 'upper', 'zfill']

>>> name= "dick"

>>>name.capitalize()

'Dick'

>>>name.center(20)

'        dick        '

>>>name.center(20,'**')

'********dick********'

>>> name

'dick'

>>>name[0:1]

'd'

>>> name= 'hdwquhnjdoiwqjdwqdiuewmdpoewkdpwqdkkmwqpodwq'

>>>name.count('s')

0

>>>name.count('w')

8

>>>name.count('w',0,10)

1

>>> name= 'alax'

>>>name[0:2]

'al'

>>>name.count('a',0,2)

1

>>>

>>> '胡伟'

'\xba\xfa\xce\xb0'          

>>> str1= '\xba\xfa\xce\xb0'

>>>print str1

胡伟

>>>str1.decode('gbk')

u'\u80e1\u4f1f'

>>>str1.decode('gbk').encode('utf-8')

'\xe8\x83\xa1\xe4\xbc\x9f'