What you would learn in Python's None: Null in Python course?
null It is a concept that you may have heard about if you are familiar with programming languages like Java or C. This is used in many languages to indicate a pointer that doesn’t point to anything, denote empty variables, and mark default parameters you haven’t provided yet. In those languages, null is usually 0; however, null in Python is a different thing.
Python uses keywordNone to denote null variables and objects. Although None serves some of the same functions as null in other languages, it is a completely different beast. None, the null in Python is not defined as 0 or any other value. None In Python, you are an object and a citizen of the first class!
How None works and what it is.
Why and when to use none as a default parameter
What does NoneType and None mean in your traceback?
How to use None type checking
What null does in Python
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