Python in 关键字
示例
检查列表中是否包含 "banana"
fruits = ["apple", "banana", "cherry"]
if "banana" in fruits
print("yes")
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定义和用法
The in keyword has two purposes
The in keyword is used to check if a value is present in a sequence (list, range, string etc.).
The in keyword is also used to iterate through a sequence in a for loop
