我见过一个 index
函数,但如果找不到它就会出错.有没有一种简单的方法来检查项目是否存在?我只想获得结果的布尔值,例如:
I have seen an index
function but it says it errors out if it can't find it. Is there a simple way to just check if the item exists? I just want to get a boolean value of the result so like:
if tuple.exists("item"):
print "it exists"
使用in
操作符:
>>> 2 in (2, 3, 4)
True
in
运算符可用于检查序列中任何元素的成员资格.
in
operator can be used to check for the membership of any element in a sequence.
并且不要将您的元组命名为 tuple
.使用不同的名称.
And don't name your tuple as tuple
. Use a different name.
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