各个数据类型内部方法释义

Posted 2020-10-21 柠檬加醋

一、int内部功能解释

1. bit_length：返回数字占用的二进制最小位数

 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
eg.
>>> num=25
>>> num.bit_length()
>>> 5                 #数字25使用二进制表示为： 000011001，占用最小位数为5（11001）

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2. conjugate：返回复数的共轭复数

a+bi（a,b均为实数）的数称为复数，其中a称为实部，b称为虚部，i称为虚数单位

def conjugate(self, *args, **kwargs): # real signature unknown
        """ Returns self, the complex conjugate of any int. """
        pass
eg.
>>> num=1.2+2.3j
>>> num.real  
>>> 1.2                  
>>> num.imag 
>>> 2.3
>>> num.conjugate()   
>>> 1.2-2.3j       

3. __abs__：返回绝对值

def __abs__(self, *args, **kwargs): # real signature unknown
        """ abs(self) """
        pass

eg.
>>> num=-10
>>> num.__abs__()
>>> 10

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4. __add__：返回二者之和

def __add__(self, *args, **kwargs): # real signature unknown
        """ Return self+value. """
        pass

eg.
>>> num=-10
>>> num.__add__(15)
>>> 5

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5. __and__：转换成二进制表示法后进行与运算

def __and__(self, *args, **kwargs): # real signature unknown
        """ Return self&value. """
        pass

eg.
>>> num1=25                      #--->0b11001
>>> num2=18                      #--->0b10010
>>> num1.__and__(num2)           # num1&num2
>>> 16                           #--->0b10000

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6. __bool_：返回bool值，即True  or  False

def __bool__(self, *args, **kwargs): # real signature unknown
        """ self != 0 """
        pass

eg.
>>> a=10
>>> a.__bool__()
>>> True

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7.