Python：Python 3.6中七大核心数据类型的内置方法源码实现

目录

一、整型 int

二、浮点型 float

三、字符串 str

四、列表 list

五、元组 tuple

六、字典 dict

七、集合 set

---

一、整型 int

Python3.6源码解析

class int(object):
    """
    int(x=0) -> integer
    int(x, base=10) -> integer
    
    Convert a number or string to an integer, or return 0 if no arguments
    are given.  If x is a number, return x.__int__().  For floating point
    numbers, this truncates towards zero.
    
    If x is not a number or if base is given, then x must be a string,
    bytes, or bytearray instance 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): # real signature unknown; restored from __doc__
        """
        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
        """ Returns self, the complex conjugate of any int. """
        pass

    @classmethod # known case
    def from_bytes(cls, bytes, byteorder, *args, **kwargs): # real signature unknown; NOTE: unreliably restored from __doc__ 
        """
        int.from_bytes(bytes, byteorder, *, signed=False) -> int
        
        Return the integer represented by the given array of bytes.
        
        The bytes argument must be a bytes-like object (e.g. bytes or bytearray).
        
        The byteorder argument determines the byte order used to represent the
        integer.  If byteorder is 'big', the most significant byte is at the
        beginning of the byte array.  If byteorder is 'little', the most
        significant byte is at the end of the byte array.  To request the native
        byte order of the host system, use `sys.byteorder' as the byte order value.
        
        The signed keyword-only argument indicates whether two's complement is
        used to represent the integer.
        """
        pass

    def to_bytes(self, length, byteorder, *args, **kwargs): # real signature unknown; NOTE: unreliably restored from __doc__ 
        """
        int.to_bytes(length, byteorder, *, signed=False) -> bytes
        
        Return an array of bytes representing an integer.
        
        The integer is represented using length bytes.  An OverflowError is
        raised if the integer is not representable with the given number of
        bytes.
        
        The byteorder argument determines the byte order used to represent the
        integer.  If byteorder is 'big', the most significant byte is at the
        beginning of the byte array.  If byteorder is 'little', the most
        significant byte is at the end of the byte array.  To request the native
        byte order of the host system, use `sys.byteorder' as the byte order value.
        
        The signed keyword-only argument determines whether two's complement is
        used to represent the integer.  If signed is False and a negative integer
        is given, an OverflowError is raised.
        """
        pass

• bit_length: 返回二进制数据所占的bit位数
• conjugate: 获取复数的共轭复数
• denominator:
• from_bytes: 将bytes解析为整数
• imag:获取复数的虚部
• numerator:
• real: 获取复数的实部
• to_bytes: 将一个大整数转换为一个字节字符串

二、浮点型 float

Python3.6源码解析

class float(object):
    """
    float(x) -> floating point number
    
    Convert a string or number to a floating point number, if possible.
    """
    def as_integer_ratio(self): # real signature unknown; restored from __doc__
        """
        float.as_integer_ratio() -> (int, int)
        
        Return a pair of integers, whose ratio is exactly equal to the original
        float and with a positive denominator.
        Raise OverflowError on infinities and a ValueError on NaNs.
        
        >>> (10.0).as_integer_ratio()
        (10, 1)
        >>> (0.0).as_integer_ratio()
        (0, 1)
        >>> (-.25).as_integer_ratio()
        (-1, 4)
        """
        pass

    def conjugate(self, *args, **kwargs): # real signature unknown
        """ Return self, the complex conjugate of any float. """
        pass

    @staticmethod # known case
    def fromhex(string): # real signature unknown; restored from __doc__
        """
        float.fromhex(string) -> float
        
        Create a floating-point number from a hexadecimal string.
        >>> float.fromhex('0x1.ffffp10')
        2047.984375
        >>> float.fromhex('-0x1p-1074')
        -5e-324
        """
        return 0.0

    def hex(self): # real signature unknown; restored from __doc__
        """
        float.hex() -> string
        
        Return a hexadecimal representation of a floating-point number.
        >>> (-0.1).hex()
        '-0x1.999999999999ap-4'
        >>> 3.14159.hex()
        '0x1.921f9f01b866ep+1'
        """
        return ""

    def is_integer(self, *args, **kwargs): # real signature unknown
        """ Return True if the float is an integer. """
        pass

• as_integer_ratio:
• conjugate:
• fromhex:
• hex:
• imag:
• is_integer:
• real:

三、字符串 str

Python3.6源码解析

class str(object):
    """
    str(object='') -> str
    str(bytes_or_buffer[, encoding[, errors]]) -> str
    
    Create a new string object from the given object. If encoding or
    errors is specified, then the object must expose a data buffer
    that will be decoded using the given encoding and error handler.
    Otherwise, returns the result of object.__str__() (if defined)
    or repr(object).
    encoding defaults to sys.getdefaultencoding().
    errors defaults to 'strict'.
    """
    def capitalize(self): # real signature unknown; restored from __doc__
        """
        S.capitalize() -> str
        
        Return a capitalized version of S, i.e. make the first character
        have upper case and t