What does none mean in python?

Friends who learn Python will encounter this word in the process of learning the basics: None. So how to understand None in Python?

None in Python is a special constant, not 0, not False, not an empty string, None means more One kind of non-existence is true emptiness.

What is None in Python? Let’s explain it below

1. None in python is a special constant

2. It is neither 0 nor False nor Empty string. It is just an object with a null value, that is, an empty object, but with no value assigned.

3. None can be used as an object, and the type of the object is: NoneTye

4. The meaning of None is more of a kind of non-existence, which is a true empty, not an empty list ([]), nor an empty string.

For example A function has no return value

For example: id(None), None == None, not None

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