python 内置类型(一)

一、真值的定义Truth Value

除以下情形外的定义均为真值:

1.定义常量为 None 或者 False.
2.数值定义中的0,如：0, float(0.0),
3.空序列、空字典、空集合、空对象等如： (), [], {}, set(), range(0)

二、and, or, not

x and y	x为真且y为真则为真，否则为假	与
x or y	x为假且y为假则为假，否则为真	或
not x	x为真则为假，否则为真	非

三、比较Comparisons

<	1 < 2
<=	2 <= 2
>	3 > 2
>=	3 >= 2
==	2 == 2
!=	3 != 2
is	'123' is '123'
is not	'123' is not '123'

四、加减乘除

东西太简单了，直接摘抄官网的

x + y	sum of x and y
x - y	difference of x and y
x * y	product of x and y
x / y	quotient of x and y
x // y	floored quotient of x and y
x % y	remainder of x / y
-x	x negated
+x	x unchanged
abs(x)	absolute value or magnitude of x
int(x)	x converted to integer
float(x)	x converted to floating point
complex(re, im)	a complex number with real part re, imaginary part im.im defaults to zero.
c.conjugate()	conjugate of the complex number c
divmod(x, y)	the pair (x // y, x % y)
pow(x, y)	x to the power y
x ** y	x to the power y

五、按位运算

x | y	bitwise or of x and y
x ^ y	bitwise exclusive or of x and y
x & y	bitwise and of x and y
x << n	x shifted left by n bits
x >> n	x shifted right by n bits
~x	the bits of x inverted