“and”、“or”和“not”想在python中如何运用？ 是python的题目，帮我算一下，谢谢，不知道是怎么算的，a...
python\u7684and or not \u95ee\u9898\u6ee1\u8db3\u6761\u4ef6\u7684\u89e3\u53ea\u6709\u4e24\u4e2a\uff1a
a0 \u6216\u8005 a>0 and b<0
\u6240\u4ee5\u63a8\u7b97\u4e00\u4e0b\uff0c\u53ea\u8981\u6ee1\u8db3a*b<0\u8fd9\u552f\u4e00\u6761\u4ef6\u4fbf\u8db3\u591f\u4e86\u3002
if (a*b)<0: return True\u5982\u679c\u8981\u7ec3\u4e60and or\u65b9\u6cd5\u7684\u8bdd\u53ef\u4ee5\u53c2\u7167\u4e00\u697c\u5927\u795e\u7684
\u4e0d\u52a0\u62ec\u53f7\u7684\u60c5\u51b5\u4e0b not\u7684\u4f18\u5148\u7ea7\u5927\u4e8eand, and\u7684\u4f18\u5148\u7ea7\u5927\u4e8e or
\u6240\u4ee5\u4e0a\u5f0f\u7b49\u4ef7\u4e8e
(not 1) or (0 and 1) or (3 and 4) or (5 and 6) or (7 and 8 and 9)
= 0 or 0 or 4 or 6 or 9
= 4
and\u8fd0\u7b97\u65f6\uff0c\u5982\u679c\u7b2c\u4e00\u4e2a\u4e3aFalse\u8fd4\u56de\u7b2c\u4e00\u4e2a\u503c\uff0c\u5426\u5219\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u503c
or \u8fd0\u7b97\u65f6\uff0c\u5982\u679c\u7b2c\u4e00\u4e2a\u4e3aFalse\u8fd4\u56de\u7b2c\u4e8c\u4e2a\u503c\uff0c\u5426\u5219\u8fd4\u56de\u7b2c\u4e00\u4e2a\u503c
\u6240\u4ee5
0 and 1 = 0
3 and 4 = 4
5 and 6 = 6
7 and 8 and 9 = 9
0 or 4 or 6 or 9 = 4
‘and’、‘or’和‘not’的优先级是not>and>or
not –表示取反运算；
and –表示取与运算；
or –表示取或运算。
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