Help on class str in module __builtin__:
关于__builtin__模块中str类的帮助信息：
class str(basestring)
| str(object) -> string | | Return a nice string representation of the object. | If the argument is a string, the return value is the same object.【返回一个对象的string格式】
| | Method resolution order: | str | basestring | object | | Methods defined here: | | __add__(...)【加法】 | x.__add__(y) <==> x+y | | __contains__(...)【蕴含】 | x.__contains__(y) <==> y in x | | __eq__(...)【相等】 | x.__eq__(y) <==> x==y | | __format__(...)【格式转换】 | S.__format__(format_spec) -> unicode | | __ge__(...)【大于等于】 | x.__ge__(y) <==> x>=y | | __getattribute__(...)【获取属性】 | x.__getattribute__('name') <==> x.name | | __getitem__(...)【获取条目】 | x.__getitem__(y) <==> x[y] | | __getnewargs__(...)【？？？？】 | | __getslice__(...)【获取切片】 | x.__getslice__(i, j) <==> x[i:j] | | Use of negative indices is not supported. | | __gt__(...)【大于】 | x.__gt__(y) <==> x>y | | __hash__(...)【？？？？】 | x.__hash__() <==> hash(x) | | __le__(...)【小于等于】 | x.__le__(y) <==> x<=y | | __len__(...)【字符串长度】 | x.__len__() <==> len(x) | | __lt__(...)【小于】 | x.__lt__(y) <==> x<y | | __mod__(...)【模】 | x.__mod__(y) <==> x%y | | __mul__(...)【乘】 | x.__mul__(n) <==> x*n | | __ne__(...)【不等于】 | x.__ne__(y) <==> x!=y | | __repr__(...)【？？？？】 | x.__repr__() <==> repr(x) | | __rmod__(...)【被模】 | x.__rmod__(y) <==> y%x | | __rmul__(...)【被乘】 | x.__rmul__(n) <==> n*x | | __sizeof__(...)【字节数】 | S.__sizeof__() -> size of S in memory, in bytes | | __str__(...)【返回x的str形式】 | x.__str__() <==> str(x) | | capitalize(...)【返回字符串S的副本，首字母大写】 | S.capitalize() -> string | | Return a copy of the string S with only its first character | capitalized. | | center(...)【返回一个以S为中心的字符串，其余字符用fillchar填充】 | S.center(width[, fillchar]) -> string | | Return S centered in a string of length width. Padding is | done using the specified fill character (default is a space) | | count(...)【返回以start开始，以end结尾的切片子串包含的字符数】 | S.count(sub[, start[, end]]) -> int | | Return the number of non-overlapping occurrences of substring sub in | string S[start:end]. Optional arguments start and end are interpreted | as in slice notation. | | decode(...)【译码】 | S.decode([encoding[,errors]]) -> object | | Decodes S using the codec registered for encoding. encoding defaults | to the default encoding. errors may be given to set a different error | handling scheme. Default is 'strict' meaning that encoding errors raise | a UnicodeDecodeError. Other possible values are 'ignore' and 'replace' | as well as any other name registered with codecs.register_error that is | able to handle UnicodeDecodeErrors. | | encode(...)【编码】 | S.encode([encoding[,errors]]) -> object | | Encodes S using the codec registered for encoding. encoding defaults | to the default encoding. errors may be given to set a different error | handling scheme. Default is 'strict' meaning that encoding errors raise | a UnicodeEncodeError. Other possible values are 'ignore', 'replace' and | 'xmlcharrefreplace' as well as any other name registered with | codecs.register_error that is able to handle UnicodeEncodeErrors. | | endswith(...)【字符串S是否以指定的suffix结尾】 | S.endswith(suffix[, start[, end]]) -> bool | | Return True if S ends with the specified suffix, False otherwise. | With optional start, test S beginning at that position. | With optional end, stop comparing S at that position. | suffix can also be a tuple of strings to try. | | expandtabs(...)【替换制表符，参数是制表符包含空格数，默认8字符】 | S.expandtabs([tabsize]) -> string | | Return a copy of S where all tab characters are expanded using spaces. | If tabsize is not given, a tab size of 8 characters is assumed. | | find(...)【寻找子串，返回索引最小的位置。没找到则返回-1】 | S.find(sub [,start [,end]]) -> int | | Return the lowest index in S where substring sub is found, | such that sub is contained within s[start:end]. Optional | arguments start and end are interpreted as in slice notation. | | Return -1 on failure. | | format(...)【？？？？】 | S.format(*args, **kwargs) -> unicode | | index(...)【与S.find类似，但是如果没有找到则引发ValueError】 | S.index(sub [,start [,end]]) -> int | | Like S.find() but raise ValueError when the substring is not found. | | isalnum(...)【如果S非空且全部字符都是字母或数字，则返回True】 | S.isalnum() -> bool | | Return True if all characters in S are alphanumeric | and there is at least one character in S, False otherwise. | | isalpha(...)【如果S非空且全部字符都是字母，则返回True】 | S.isalpha() -> bool | | Return True if all characters in S are alphabetic | and there is at least one character in S, False otherwise. | | isdigit(...)【如果S非空且全部字符都是数字，则返回True】 | S.isdigit() -> bool | | Return True if all characters in S are digits | and there is at least one character in S, False otherwise. | | islower(...)【S为非空且全部字符均为小写字母，则返回真】 | S.islower() -> bool | | Return True if all cased characters in S are lowercase and there is | at least one cased character in S, False otherwise. | | isspace(...)【S为非空且全部字符均为空格，则返回真】 | S.isspace() -> bool | | Return True if all characters in S are whitespace | and there is at least one character in S, False otherwise. | | istitle(...)【判断S是否是title，title就是字符串中所有单词首字母大写，其余小写】 | S.istitle() -> bool | | Return True if S is a titlecased string and there is at least one | character in S, i.e. uppercase characters may only follow uncased | characters and lowercase characters only cased ones. Return False | otherwise. | | isupper(...)【S为非空且全部字符均为大写字母，则返回真】 | S.isupper() -> bool | | Return True if all cased characters in S are uppercase and there is | at least one cased character in S, False otherwise. | | join(...)【在iterable中的每两个元素之间放一个S】 | S.join(iterable) -> string | | Return a string which is the concatenation of the strings in the | iterable. The separator between elements is S. | | ljust(...)【左对齐，默认空格补齐】 | S.ljust(width[, fillchar]) -> string | | Return S left-justified in a string of length width. Padding is | done using the specified fill character (default is a space). | | lower(...)【返回S的小写副本】 | S.lower() -> string | | Return a copy of the string S converted to lowercase. | | lstrip(...)【去掉左边的空白字符（回车、空格、tab之类）】 | S.lstrip([chars]) -> string or unicode | | Return a copy of the string S with leading whitespace removed. | If chars is given and not None, remove characters in chars instead. | If chars is unicode, S will be converted to unicode before stripping | | partition(...) | S.partition(sep) -> (head, sep, tail)>>> print s
zhangheABC>>> print s.partition('gh')('zhan', 'gh', 'eABC') | Search for the separator sep in S, and return the part before it, | the separator itself, and the part after it. If the separator is not | found, return S and two empty strings. | | replace(...)【用new替换S中的old，cnt表示替换几个】 | S.replace(old, new[, count]) -> string | | Return a copy of string S with all occurrences of substring | old replaced by new. If the optional argument count is | given, only the first count occurrences are replaced. | | rfind(...)【在S中找sub子串，返回索引最大的那个，失败就返回-1】 | S.rfind(sub [,start [,end]]) -> int | | Return the highest index in S where substring sub is found, | such that sub is contained within s[start:end]. Optional | arguments start and end are interpreted as in slice notation. | | Return -1 on failure. | | rindex(...)【和s.rfind类似，但是如果找不到就返回valueerror】 | S.rindex(sub [,start [,end]]) -> int | | Like S.rfind() but raise ValueError when the substring is not found. | | rjust(...)【右对齐，默认用空格补齐】 | S.rjust(width[, fillchar]) -> string | | Return S right-justified in a string of length width. Padding is | done using the specified fill character (default is a space) | | rpartition(...) | S.rpartition(sep) -> (head, sep, tail) | | Search for the separator sep in S, starting at the end of S, and return | the part before it, the separator itself, and the part after it. If the | separator is not found, return two empty strings and S. | | rsplit(...)【把S根据sep分割成一个list】 | S.rsplit([sep [,maxsplit]]) -> list of strings | | Return a list of the words in the string S, using sep as the | delimiter string, starting at the end of the string and working | to the front. If maxsplit is given, at most maxsplit splits are | done. If sep is not specified or is None, any whitespace string | is a separator. | | rstrip(...)【去除右边的字串】 | S.rstrip([chars]) -> string or unicode | | Return a copy of the string S with trailing whitespace removed. | If chars is given and not None, remove characters in chars instead. | If chars is unicode, S will be converted to unicode before stripping | | split(...)【分割】 | S.split([sep [,maxsplit]]) -> list of strings | | Return a list of the words in the string S, using sep as the | delimiter string. If maxsplit is given, at most maxsplit | splits are done. If sep is not specified or is None, any | whitespace string is a separator and empty strings are removed | from the result. | | splitlines(...) | S.splitlines([keepends]) -> list of strings | | Return a list of the lines in S, breaking at line boundaries. | Line breaks are not included in the resulting list unless keepends | is given and true. | | startswith(...)【是否以prefix开头】 | S.startswith(prefix[, start[, end]]) -> bool | | Return True if S starts with the specified prefix, False otherwise. | With optional start, test S beginning at that position. | With optional end, stop comparing S at that position. | prefix can also be a tuple of strings to try. | | strip(...)【去除两边的空格】 | S.strip([chars]) -> string or unicode | | Return a copy of the string S with leading and trailing | whitespace removed. | If chars is given and not None, remove characters in chars instead. | If chars is unicode, S will be converted to unicode before stripping | | swapcase(...)【大写变小写，小写变大写】 | S.swapcase() -> string | | Return a copy of the string S with uppercase characters | converted to lowercase and vice versa. | | title(...)【变成title】 | S.title() -> string | | Return a titlecased version of S, i.e. words start with uppercase | characters, all remaining cased characters have lowercase. | | translate(...) | S.translate(table [,deletechars]) -> string | | Return a copy of the string S, where all characters occurring | in the optional argument delete chars are removed, and the | remaining characters have been mapped through the given | translation table, which must be a string of length 256. | | upper(...)【返回一个S的大写副本】 | S.upper() -> string | | Return a copy of the string S converted to uppercase. | | zfill(...)【0左填充】 | S.zfill(width) -> string | | Pad a numeric string S with zeros on the left, to fill a field | of the specified width. The string S is never truncated. | | ---------------------------------------------------------------------- | Data and other attributes defined here: | | __new__ = <built-in method __new__ of type object> | T.__new__(S, ...) -> a new object with type S, a subtype of T