python字符类型的一些方法小结

int 数字类型

class int(object):
  """
  int(x=0) -> int or long
  int(x,base=10) -> int or long
  
  Convert a number or string to an integer,or return 0 if no arguments
  are given. If x is floating point,the conversion truncates towards zero.
  If x is outside the integer range,the function returns a long instead.
  
  If x is not a number or if base is given,then x must be a string or
  Unicode object representing an integer literal in the given base. The
  literal can be preceded by '+' or '-' and be surrounded by whitespace.
  The base defaults to 10. Valid bases are 0 and 2-36. Base 0 means to
  interpret the base from the string as an integer literal.
  >>> int('0b100',base=0)
  """
  def bit_length(self): 
    """ 返回表示该数字的时占用的最少位数 """
    """
    int.bit_length() -> int
    
    Number of bits necessary to represent self in binary.
    >>> bin(37)
    '0b100101'
    >>> (37).bit_length()
    """
    return 0

  def conjugate(self,*args,**kwargs): # real signature unknown
    """ 返回该复数的共轭复数 """
    """ Returns self,the complex conjugate of any int. """
    pass

  def __abs__(self):
    """ 返回绝对值 """
    """ x.__abs__() <==> abs(x) """
    pass

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

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

  def __cmp__(self,y): 
    """ 比较两个数大小 """
    """ x.__cmp__(y) <==> cmp(x,y) """
    pass

  def __coerce__(self,y):
    """ 强制生成一个元组 """ 
    """ x.__coerce__(y) <==> coerce(x,y) """
    pass

  def __divmod__(self,y): 
    """ 相除，得到商和余数组成的元组 """ 
    """ x.__divmod__(y) <==> divmod(x,y) """
    pass

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

  def __float__(self): 
    """ 转换为浮点类型 """ 
    """ x.__float__() <==> float(x) """
    pass

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

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

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

  def __getnewargs__(self,**kwargs): # real signature unknown
    """ 内部调用 __new__方法或创建对象时传入参数使用 """ 
    pass

  def __hash__(self): 
    """如果对象object为哈希表类型，返回对象object的哈希值。哈希值为整数。在字典查找中，哈希值用于快速比较字典的键。两个数值如果相等，则哈希值也相等。"""
    """ x.__hash__() <==> hash(x) """
    pass

  def __hex__(self): 
    """ 返回当前数的 十六进制 表示 """ 
    """ x.__hex__() <==> hex(x) """
    pass

  def __index__(self): 
    """ 用于切片，数字无意义 """
    """ x[y:z] <==> x[y.__index__():z.__index__()] """
    pass

  def __init__(self,x,base=10): # known special case of int.__init__
    """ 构造方法，执行 x = 123 或 x = int(10) 时，自动调用，暂时忽略 """ 
    """
    int(x=0) -> int or long
    int(x,base=10) -> int or long
    
    Convert a number or string to an integer,or return 0 if no arguments
    are given. If x is floating point,the conversion truncates towards zero.
    If x is outside the integer range,the function returns a long instead.
    
    If x is not a number or if base is given,then x must be a string or
    Unicode object representing an integer literal in the given base. The
    literal can be preceded by '+' or '-' and be surrounded by whitespace.
    The base defaults to 10. Valid bases are 0 and 2-36. Base 0 means to
    interpret the base from the string as an integer literal.
    >>> int('0b100',base=0)
    # (copied from class doc)
    """
    pass

  def __int__(self): 
    """ 转换为整数 """ 
    """ x.__int__() <==> int(x) """
    pass

  def __invert__(self): 
    """ x.__invert__() <==> ~x """
    pass

  def __long__(self): 
    """ 转换为长整数 """ 
    """ x.__long__() <==> long(x) """
    pass

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

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

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

  def __neg__(self): 
    """ x.__neg__() <==> -x """
    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 __nonzero__(self): 
    """ x.__nonzero__() <==> x != 0 """
    pass

  def __oct__(self): 
    """ 返回改值的 八进制 表示 """ 
    """ x.__oct__() <==> oct(x) """
    pass

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

  def __pos__(self): 
    """ x.__pos__() <==> +x """
    pass

  def __pow__(self,y,z=None): 
    """ 幂，次方 """ 
    """ x.__pow__(y[,z]) <==> pow(x,y[,z]) """
    pass

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

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

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

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

  def __repr__(self): 
    """转化为解释器可读取的形式 """
    """ x.__repr__() <==> repr(x) """
    pass

  def __str__(self): 
    """转换为人阅读的形式，如果没有适于人阅读的解释形式的话，则返回解释器课阅读的形式"""
    """ x.__str__() <==> str(x) """
    pass

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

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

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

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

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

  def __rpow__(self,z=None): 
    """ y.__rpow__(x[,z]) """
    pass

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

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

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

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

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

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

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

  def __trunc__(self,**kwargs): 
    """ 返回数值被截取为整形的值，在整形中无意义 """
    pass

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

  denominator = property(lambda self: object(),lambda self,v: None,lambda self: None) # default
  """ 分母 = 1 """
  """the denominator of a rational number in lowest terms"""

  imag = property(lambda self: object(),lambda self: None) # default
  """ 虚数，无意义 """
  """the imaginary part of a complex number"""

  numerator = property(lambda self: object(),lambda self: None) # default
  """ 分子 = 数字大小 """
  """the numerator of a rational number in lowest terms"""

  real = property(lambda self: object(),lambda self: None) # default
  """ 实属，无意义 """
  """the real part of a complex number"""

int

str 字符串类型的一些方法

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,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,end=None): 
    """ 是否以 xxx 结束 """
    """
    S.endswith(suffix[,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,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,end=None): 
    """ 子序列位置，如果没找到，报错 """
    S.index(sub [,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,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,end=None): 
    """
    S.rfind(sub [,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,end=None): 
    """
    S.rindex(sub [,end]]) -> int
    
    Like S.rfind() but raise ValueError when the substring is not found.
    """
    return 0

  def rjust(self,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,starting at the end of S,and return
    the part before it,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,S will be converted to unicode before stripping
    """
    return ""

  def split(self,maxsplit=None): 
    """ 分割， maxsplit最多分割几次 """
    """
    S.split([sep [,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,end=None): 
    """ 是否起始 """
    """
    S.startswith(prefix[,end]]) -> bool
    
    Return True if S starts with the specified prefix,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,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,**kwargs): # real signature unknown
    pass

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

  @staticmethod # known case of __new__
  def __new__(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,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

str

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