Using a static local variable is better than using a module-level variable because it is always best to keep the scope of a variable as narrow as possible.

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Quizplus · Accepted Answer

Keeping the scope of a variable narrow helps to prevent potential naming conflicts, improves code readability, and promotes better code organization. Static local variables are only accessible within the scope of the function in which they are defined, making them a useful tool for managing data within a particular function without affecting other parts of the code. Module-level variables, on the other hand, are accessible throughout the entire module and can potentially cause naming conflicts or unexpected behavior if not used carefully.

Using a Static Local Variable Is Better Than Using a Module-Level