Final answer:The 'nonetype' object has no attribute 'lower' error in Python indicates that you are attempting to call a string method on a NoneType object, which is Python'sequivalentof null. This usually happens when a variable expected to hold a string has not been initialized properly or when a function returns None.Explanation:The error message 'nonetype' object has no attribute 'lower' typically occurs in programming when a method or function that is expected to operate on a string is instead called on aNoneTypeobject. In Python, this means that the variable you are trying to call the.lower()method on is actuallyNone, which is Python's null value. This can happen for various reasons, such as trying to call the method on a variable that has not been initialized or on a variable that is supposed to hold a string but was assignedNoneeither directly or as a result of afunctionthat returnedNone.Learn more aboutNoneType errorhere:brainly.com/question/30778034#SPJ11...

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