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python从右向左第三个字符,python的字符串学习(三)

C:Python27python.exe D: / git / Python / FullStack / Study / index.py

[ '__add__' , '__class__' , '__contains__' , '__delattr__' , '__doc__' , '__eq__' , '__format__' , '__ge__' , '__getattribute__' , '__getitem__' , '__getnewargs__' , '__getslice__' , '__gt__' , '__hash__' , '__init__' , '__le__' , '__len__' , '__lt__' , '__mod__' , '__mul__' , '__ne__' , '__new__' , '__reduce__' , '__reduce_ex__' , '__repr__' , '__rmod__' , '__rmul__' , '__setattr__' , '__sizeof__' , '__str__' , '__subclasshook__' , '_formatter_field_name_split' , '_formatter_parser' , 'capitalize' , 'center' , 'count' , 'decode' , 'encode' , 'endswith' , 'expandtabs' , 'find' , 'format' , 'index' , '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' ]

Help on class str in module __builtin__:

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 .

|

| Method resolution order:

| str

| basestring

| object

|

| Methods defined here:

|

| __add__(...)

| x.__add__(y) < = = > x + y

|

| __contains__(...)

| x.__contains__(y) < = = > y in x

|

| __eq__(...)

| x.__eq__(y) < = = > x = = y

|

| __format__(...)

| S.__format__(format_spec) - > string

|

| Return a formatted version of S as described by format_spec.

|

| __ge__(...)

| x.__ge__(y) < = = > x> = y

|

| __getattribute__(...)

| x.__getattribute__( 'name' ) < = = > x.name

|

| __getitem__(...)

| x.__getitem__(y) < = = > x[y]

|

| __getnewargs__(...)

|

| __getslice__(...)

| x.__getslice__(i, j) < = = > x[i:j]

|

| Use of negative indices is not supported.

|

| __gt__(...)

| x.__gt__(y) < = = > x>y

|

| __hash__(...)

| x.__hash__() < = = > hash (x)

|

| __le__(...)

| x.__le__(y) < = = > x< = y

|

| __len__(...)

| x.__len__() < = = > len (x)

|

| __lt__(...)

| x.__lt__(y) < = = > x

|

| __mod__(...)

| x.__mod__(y) < = = > x % y

|

| __mul__(...)

| x.__mul__(n) < = = > x * n

|

| __ne__(...)

| x.__ne__(y) < = = > x! = y

|

| __repr__(...)

| x.__repr__() < = = > repr (x)

|

| __rmod__(...)

| x.__rmod__(y) < = = > y % x

|

| __rmul__(...)

| x.__rmul__(n) < = = > n * x

|

| __sizeof__(...)

| S.__sizeof__() - > size of S in memory, in bytes

|

| __str__(...)

| x.__str__() < = = > str (x)

|

| capitalize(...)

| S.capitalize() - > string

|

| Return a copy of the string S with only its first character

| capitalized.

|

| center(...)

| 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(...)

| 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(...)

| 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(...)

| 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(...)

| 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(...)

| 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(...)

| 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) - > string

|

| Return a formatted version of S, using substitutions from args and kwargs.

| The substitutions are identified by braces ( '{' and '}' ).

|

| index(...)

| S.index(sub [,start [,end]]) - > int

|

| Like S.find() but raise ValueError when the substring is not found.

|

| isalnum(...)

| S.isalnum() - > bool

|

| Return True if all characters in S are alphanumeric

| and there is at least one character in S, False otherwise.

|

| isalpha(...)

| S.isalpha() - > bool

|

| Return True if all characters in S are alphabetic

| and there is at least one character in S, False otherwise.

|

| isdigit(...)

| 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.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.isspace() - > bool

|

| Return True if all characters in S are whitespace

| and there is at least one character in S, False otherwise.

|

| istitle(...)

| 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.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(...)

| S.join(iterable) - > string

|

| Return a string which is the concatenation of the strings in the

| iterable. The separator between elements is S.

|

| ljust(...)

| 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(...)

| S.lower() - > string

|

| Return a copy of the string S converted to lowercase.

|

| lstrip(...)

| 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)

|

| 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(...)

| 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(...)

| 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(...)

| S.rindex(sub [,start [,end]]) - > int

|

| Like S.rfind() but raise ValueError when the substring is not found.

|

| rjust(...)

| 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(...)

| 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(...)

| 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(...)

| 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 = False ) - > 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(...)

| 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(...)

| 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(...)

| S.swapcase() - > string

|

| Return a copy of the string S with uppercase characters

| converted to lowercase and vice versa.

|

| 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 deletechars are removed, and the

| remaining characters have been mapped through the given

| translation table, which must be a string of length 256 or None .

| If the table argument is None , no translation is applied and

| the operation simply removes the characters in deletechars.

|

| upper(...)

| S.upper() - > string

|

| Return a copy of the string S converted to uppercase.

|

| zfill(...)

| 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__ =

| T.__new__(S, ...) - > a new object with type S, a subtype of T

None

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