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Python Function Not Defined Error Guide

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Common Causes: Error occurs when Python can't find definition for a function
Calling function before definition prevents proper processing
Case-sensitive spelling issues trigger the error
Forgetting to import external modules causes the problem
Solutions: Check function name spelling across all references
Define functions before calling them
Import external modules before using functions
Use IDE with linting for real-time error detection
Prevention Tips: Import modules at the top of the script
Use descriptive function names
Validate function names before calling
Take advantage of IDE's built-in linting features