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perhaps this link could help you: https://www.educative.io/edpresso/what-is-the-none-keyword-in-python
It's not a string or any other common data type. None (or NULL) is a special datatype referring to the fact that a variable is not set, or unset. Note that this is different from the number value 0 and also different from saving strings like "none" or "null", or even an empty string. it's also not the same as false, although comparing null/none to anything except null/none will always return false, so languages usually have other means of checking whether a value is set.
Perfect👍.... trying such things is what the lessons are for. Also use the comment part there for questions like this.