Python表达式 not 1 or 0 and 1 or 3 and 4 or 5 and 6 or 7 and 8 and 9,为什么
时间: 2024-04-28 08:20:19 浏览: 9
这个表达式的值是6。
首先要理解Python中逻辑运算符的优先级:not > and > or。
根据这个优先级,我们可以对这个表达式进行分组,得到如下的表达式:
(not 1) or ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9))))
接下来我们逐步计算这个表达式:
1. (not 1)的值为False;
2. (0 and 1)的值为0;
3. (3 and 4)的值为4;
4. (5 and 6)的值为6;
5. (7 and 8 and 9)的值为9;
6. ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9))))的值为4;
7. ((not 1) or ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9))))的值为4;
8. ((not 1) or ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9)))) or 5)的值为5;
9. ((not 1) or ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9)))) or 5 or 6)的值为6;
10. ((not 1) or ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9)))) or 5 or 6 or 7)的值为6;
11. ((not 1) or ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9)))) or 5 or 6 or 7 or 8)的值为6;
12. ((not 1) or ((0 and 1) or ((3 and 4) or ((5 and 6) or (7 and 8 and 9)))) or 5 or 6 or 7 or 8 or 9)的值为6。
因此,这个表达式的值是6。