help()

help() 用于查看函数或模块的帮助信息

In [1]: help(id)    # 查看id()这个函数的帮助信息，注意不要写成help(id())
id(...)
    id(object) -> integer
    Return the identity of an object.  This is guaranteed to be unique among
    simultaneously existing objects.  (Hint: it's the object's memory address.)
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