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Task: Implement a Variable Definition Checker in Python

Task: Implement a Variable Definition Checker in Python: a task in Terminal-Lego-15k (Harbor dataset). In Python, unlike some other languages (Perl's defined() , PHP's isset() , Ruby's defined? ), there is no built-in function to directly check if a variable has been defined. Your task is to…

The task

In Python, unlike some other languages (Perl's `defined()`, PHP's `isset()`, Ruby's `defined?`), there is no built-in function to directly check if a variable has been defined. Your task is to create a utility module that provides functions to check whether a variable is defined at runtime.

Part of PrimeIntellect/Terminal-Lego-15k.