Python-str函数
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elp 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
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