python字符类型的一些方法小结

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.
  """
  def capitalize(self): 
    """ 首字母变大写 """
    """
    S.capitalize() -> string
    
    Return a copy of the string S with only its first character
    capitalized.
    """
    return ""

  def center(self, width, fillchar=None): 
    """ 内容居中，width：总长度；fillchar：空白处填充内容，默认无 """
    """
    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)
    """
    return ""

  def count(self, sub, start=None, end=None): 
    """ 子序列个数 """
    """
    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.
    """
    return 0

  def decode(self, encoding=None, errors=None): 
    """ 解码 """
    """
    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.
    """
    return object()

  def encode(self, encoding=None, errors=None): 
    """ 编码，针对unicode """
    """
    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.
    """
    return object()

  def endswith(self, suffix, start=None, end=None): 
    """ 是否以 xxx 结束 """
    """
    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.
    """
    return False

  def expandtabs(self, tabsize=None): 
    """ 将tab转换成空格，默认一个tab转换成8个空格 """
    """
    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.
    """
    return ""

  def find(self, sub, start=None, end=None): 
    """ 寻找子序列位置，如果没找到，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.
    """
    return 0

  def format(*args, **kwargs): # known special case of str.format
    """ 字符串格式化，动态参数，将函数式编程时细说 """
    """
    S.format(*args, **kwargs) -> string
    
    Return a formatted version of S, using substitutions from args and kwargs.
    The substitutions are identified by braces ('{' and '}').
    """
    pass

  def index(self, sub, start=None, end=None): 
    """ 子序列位置，如果没找到，报错 """
    S.index(sub [,start [,end]]) -> int
    
    Like S.find() but raise ValueError when the substring is not found.
    """
    return 0

  def isalnum(self): 
    """ 是否是字母和数字 """
    """
    S.isalnum() -> bool
    
    Return True if all characters in S are alphanumeric
    and there is at least one character in S, False otherwise.
    """
    return False

  def isalpha(self): 
    """ 是否是字母 """
    """
    S.isalpha() -> bool
    
    Return True if all characters in S are alphabetic
    and there is at least one character in S, False otherwise.
    """
    return False

  def isdigit(self): 
    """ 是否是数字 """
    """
    S.isdigit() -> bool
    
    Return True if all characters in S are digits
    and there is at least one character in S, False otherwise.
    """
    return False

  def islower(self): 
    """ 是否小写 """
    """
    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.
    """
    return False

  def isspace(self): 
    """
    S.isspace() -> bool
    
    Return True if all characters in S are whitespace
    and there is at least one character in S, False otherwise.
    """
    return False

  def istitle(self): 
    """
    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.
    """
    return False

  def isupper(self): 
    """
    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.
    """
    return False

  def join(self, iterable): 
    """ 连接 """
    """
    S.join(iterable) -> string
    
    Return a string which is the concatenation of the strings in the
    iterable. The separator between elements is S.
    """
    return ""

  def ljust(self, width, fillchar=None): 
    """ 内容左对齐，右侧填充 """
    """
    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).
    """
    return ""

  def lower(self): 
    """ 变小写 """
    """
    S.lower() -> string
    
    Return a copy of the string S converted to lowercase.
    """
    return ""

  def lstrip(self, chars=None): 
    """ 移除左侧空白 """
    """
    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
    """
    return ""

  def partition(self, sep): 
    """ 分割，前，中，后三部分 """
    """
    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.
    """
    pass

  def replace(self, old, new, count=None): 
    """ 替换 """
    """
    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.
    """
    return ""

  def rfind(self, sub, start=None, end=None): 
    """
    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.
    """
    return 0

  def rindex(self, sub, start=None, end=None): 
    """
    S.rindex(sub [,start [,end]]) -> int
    
    Like S.rfind() but raise ValueError when the substring is not found.
    """
    return 0

  def rjust(self, width, fillchar=None): 
    """
    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)
    """
    return ""

  def rpartition(self, sep): 
    """
    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.
    """
    pass

  def rsplit(self, sep=None, maxsplit=None): 
    """
    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.
    """
    return []

  def rstrip(self, chars=None): 
    """
    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
    """
    return ""

  def split(self, sep=None, maxsplit=None): 
    """ 分割， maxsplit最多分割几次 """
    """
    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.
    """
    return []

  def splitlines(self, keepends=False): 
    """ 根据换行分割 """
    """
    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.
    """
    return []

  def startswith(self, prefix, start=None, end=None): 
    """ 是否起始 """
    """
    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.
    """
    return False

  def strip(self, chars=None): 
    """ 移除两段空白 """
    """
    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
    """
    return ""

  def swapcase(self): 
    """ 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.
    """
    return ""

  def title(self): 
    """
    S.title() -> string
    
    Return a titlecased version of S, i.e. words start with uppercase
    characters, all remaining cased characters have lowercase.
    """
    return ""

  def translate(self, table, deletechars=None): 
    """
    转换，需要先做一个对应表，最后一个表示删除字符集合
    intab = "aeiou"
    outtab = "12345"
    trantab = maketrans(intab, outtab)
    str = "this is string example....wow!!!"
    print str.translate(trantab, 'xm')
    """

    """
    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.
    """
    return ""

  def upper(self): 
    """
    S.upper() -> string
    
    Return a copy of the string S converted to uppercase.
    """
    return ""

  def zfill(self, width): 
    """方法返回指定长度的字符串，原字符串右对齐，前面填充0。"""
    """
    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.
    """
    return ""

  def _formatter_field_name_split(self, *args, **kwargs): # real signature unknown
    pass

  def _formatter_parser(self, *args, **kwargs): # real signature unknown
    pass

  def __add__(self, y): 
    """ x.__add__(y) <==> x+y """
    pass

  def __contains__(self, y): 
    """ x.__contains__(y) <==> y in x """
    pass

  def __eq__(self, y): 
    """ x.__eq__(y) <==> x==y """
    pass

  def __format__(self, format_spec): 
    """
    S.__format__(format_spec) -> string
    
    Return a formatted version of S as described by format_spec.
    """
    return ""

  def __getattribute__(self, name): 
    """ x.__getattribute__('name') <==> x.name """
    pass

  def __getitem__(self, y): 
    """ x.__getitem__(y) <==> x[y] """
    pass

  def __getnewargs__(self, *args, **kwargs): # real signature unknown
    pass

  def __getslice__(self, i, j): 
    """
    x.__getslice__(i, j) <==> x[i:j]
          
          Use of negative indices is not supported.
    """
    pass

  def __ge__(self, y): 
    """ x.__ge__(y) <==> x>=y """
    pass

  def __gt__(self, y): 
    """ x.__gt__(y) <==> x>y """
    pass

  def __hash__(self): 
    """ x.__hash__() <==> hash(x) """
    pass

  def __init__(self, string=''): # known special case of str.__init__
    """
    str(object='') -> string
    
    Return a nice string representation of the object.
    If the argument is a string, the return value is the same object.
    # (copied from class doc)
    """
    pass

  def __len__(self): 
    """ x.__len__() <==> len(x) """
    pass

  def __le__(self, y): 
    """ x.__le__(y) <==> x<=y """
    pass

  def __lt__(self, y): 
    """ x.__lt__(y) <==> x<y """
    pass

  def __mod__(self, y): 
    """ x.__mod__(y) <==> x%y """
    pass

  def __mul__(self, n): 
    """ x.__mul__(n) <==> x*n """
    pass

  @staticmethod # known case of __new__
  def __new__(S, *more): 
    """ T.__new__(S, ...) -> a new object with type S, a subtype of T """
    pass

  def __ne__(self, y): 
    """ x.__ne__(y) <==> x!=y """
    pass

  def __repr__(self): 
    """ x.__repr__() <==> repr(x) """
    pass

  def __rmod__(self, y): 
    """ x.__rmod__(y) <==> y%x """
    pass

  def __rmul__(self, n): 
    """ x.__rmul__(n) <==> n*x """
    pass

  def __sizeof__(self): 
    """ S.__sizeof__() -> size of S in memory, in bytes """
    pass

  def __str__(self): 
    """ x.__str__() <==> str(x) """
    pass

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