下表列出了从最高优先级到最低优先级的所有运算符,如下所示

序号 运算符 描述
1 ** 指数(次幂)运算
2 ~ + - 补码,一元加减(最后两个的方法名称是+@-@)
3 * / % // 乘法,除法,模数和地板除
4 + - 加法减法
5 >> << 向右和向左位移
6 & 按位与
7 ^ | 按位异或和常规的“OR
8 <= < > >= 比较运算符
9 <> == != 等于运算符
10 = %= /= //= -= += *= **= 赋值运算符
11 is is not 身份运算符
12 in not in 成员运算符
13 not or and 逻辑运算符

实例

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#! /usr/bin/env python
#coding=utf-8
#save file : operators_precedence_example.py

#!/usr/bin/python3

a = 20
b = 10
c = 15
d = 5

print ("a:%d b:%d c:%d d:%d" % (a,b,c,d ))
e = (a + b) * c / d #( 30 * 15 ) / 5
print ("Value of (a + b) * c / d is ", e)

e = ((a + b) * c) / d # (30 * 15 ) / 5
print ("Value of ((a + b) * c) / d is ", e)

e = (a + b) * (c / d) # (30) * (15/5)
print ("Value of (a + b) * (c / d) is ", e)

e = a + (b * c) / d # 20 + (150/5)
print ("Value of a + (b * c) / d is ", e)

以上实例输出结果为:

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Value of (a + b) * c / d is  90.0
Value of ((a + b) * c) / d is 90.0
Value of (a + b) * (c / d) is 90.0
Value of a + (b * c) / d is 50.0