Python笔记

str类

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

int数字

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)
     4
    """
   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()
        6
        """
        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, *args, **kwargs): # real signature unknown
        pass

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

   def __getnewargs__(self, *args, **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)
        4
        # (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, x, z=None): 
        """ y.__rpow__(x[, z]) <==> pow(x, y[, 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, *args, **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, v: None, lambda self: None)  # default
        """ 虚数,无意义 """
        """the imaginary part of a complex number"""

        numerator = property(lambda self: object(), lambda self, v: None, 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, v: None, lambda self: None)  # default
        """ 实属,无意义 """
        """the real part of a complex number"""
文章目录
  1. 1. str类
  2. 2. int数字
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