Python Basics Explained: Functions, Error Handling, and File Operations

A new developer guide published on DEV Community breaks down core Python programming concepts without requiring prior coding experience. The guide covers how functions work, including parameter types such as positional, keyword, default, and variable arguments, as well as scope and return values. It also outlines eight common built-in exceptions in Python, explaining the conditions that trigger each error. The article further explains error handling using try, except, else, finally, and raise blocks to manage runtime failures gracefully. Finally, it addresses file operations, covering read, write, and append modes alongside the context manager for safe resource handling.