Web Reference: The NameError: name '...' is not defined is one of Python's most fundamental errors. It occurs when you try to use a variable, function, class, or module that Python doesn't recognize in the current scope because it hasn't been defined, assigned a value, or imported correctly. Jan 23, 2025 · In Python, a NameError is raised when the interpreter encounters a name (such as a variable, function, or class name) that it cannot resolve. Python uses a naming system to keep track of variables, functions, and other objects. Python is growing daily, and getting errors while programming is a mistake from where one learns the best. One of the most common is the dreaded NameError.This error arises when Python encounters a variable or function name it doesn’t recognize. In Python, a NameError occurs when the interpreter fails to find a defined variable or function within t...
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