Python Day 3: Mastering Functions, Scope Rules, and Functional Programming

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A tutorial series on Python programming has reached its third installment, focusing on building reusable and modular code using advanced function features. The lesson covers flexible argument handling, including default values, keyword-only arguments, and dynamic argument collection via *args and **kwargs. It also explains Python's LEGB rule, which governs how variable names are resolved across local, enclosing, global, and built-in scopes. Practical examples demonstrate how nonlocal and global keywords allow functions to modify variables outside their immediate scope. The session aims to help learners transition from writing basic scripts to constructing more dynamic and maintainable Python utilities.

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