python global name is not defined

Title: Understanding and Resolving "Python Global Name is Not Defined" Error
Introduction:
One common error that Python developers encounter is the "NameError: name 'variable_name' is not defined." This error occurs when you try to use a variable that hasn't been defined in the current scope. In this tutorial, we'll explore the reasons behind this error and discuss how to resolve it with practical code examples.
Common Causes of "NameError: name 'variable_name' is not defined":
a. Typo: Check for typos in your variable names. Python is case-sensitive, so 'variable' and 'Variable' are different.
b. Variable Definition: Ensure that the variable is defined before you try to use it. Variables defined inside a function are not accessible globally unless explicitly declared as global.
Code Examples:
Example 1: Local Variable in a Function
In this example, the function example_function tries to print a variable (global_variable) that is not defined within its scope.
Example 2: Global Variable
Here, global_variable is defined outside the function, making it accessible globally.
Example 3: Typo
Check for typos in variable names, as shown in this example where my_variable is misspelled as my_varible.
Conclusion:
Understanding variable scope and being mindful of where variables are defined is crucial to avoiding the "NameError: name 'variable_name' is not defined" in Python. By following the examples and resolutions provided in this tutorial, you can troubleshoot and fix this common error in your code.
ChatGPT