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Title: Understanding and Troubleshooting "NameError: name 'function_name' is not defined" in Python
Introduction:
One common error that Python developers encounter is the "NameError: name 'function_name' is not defined." This error occurs when the interpreter can't find a reference to the specified function or variable in the current scope. In this tutorial, we'll explore the reasons behind this error and discuss ways to troubleshoot and resolve it.
Before using a function or variable, ensure that it has been defined. Check for typos and verify that the function or variable is declared in the correct scope.
Verify that the function or variable is defined in the appropriate scope. If it's defined within a specific block, make sure you're trying to access it from the correct location.
If you're working with modules or external files, check if you have imported the module properly using the import statement.
Ensure that the code execution reaches the point where the function or variable is defined. It's possible that the error occurs before the definition is reached.
Check if you have renamed a module or function using the as keyword during import.
By following these steps and carefully reviewing your code, you should be able to identify and fix the "NameError: name 'function_name' is not defined" issue in Python. Happy coding!
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