Python in 的逻辑判断

python 中的in，要看你的目标是什么

1.字符串

>>> "in" in "indigo"
True
>>> "in" in "violet"
False
>>> "0" in "10"
True
>>> "1" in "10"
True

2. 数组

>>> "in" in ["in", "out"]
True
>>> "in" in ["indigo", "violet"]
False

3. 字典，是看key

>>> "in" in {"in": "out"}
True
>>> "in" in {"out": "in"}
False

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