python - Python if, else 语句

Question

我开始自学python是为了好玩，我正在写这篇文章，但没有得到我想要的结果：

if no1234 == 0:
     print "Player and Computer tie!\n"
elif no1234 == 1 or 2:
     print "Player wins!\n"
elif no1234 == 3 or 4:
     print "Computer wins!\n"

计算机获胜不会出现，是不是我忘记了什么

Answer 1

elif no1234 == 1 or 2:被解析为elif (no1234 == 1) or (2):

这将永远是True因为bool(2) == True你正在使用一个or语句。

你可能想要：

elif no1234 == 1 or no1234 == 2:

甚至：

elif no1234 in (1, 2):

这对您的其他elif.

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总而言之：

if no1234 == 0:
     print "Player and Computer tie!\n"
elif no1234 in (1, 2):
     print "Player wins!\n"
elif no1234 in (3, 4):
     print "Computer wins!\n"

Answer 2

你需要这个：

if no1234 == 0:
     print "Player and Computer tie!\n"
elif no1234 == 1 or no1234 == 2:
     print "Player wins!\n"
elif no1234 == 3 or no1234 == 4:
     print "Computer wins!\n"