Python Text Processing: Filtering Lines from Files

Working with text files is one of the most fundamental tasks in software development, data analysis, and automation. This text-based course teaches you how to efficiently read, parse, and filter lines of text using Python, giving you the practical tools to handle real-world data files. You will start by understanding how Python interacts with file systems and how to simulate file inputs for testing. From there, you will learn to extract exact information, clean raw text, and write refined outputs back to disk. What you'll learn: Understand core file I/O operations and context managers in Python; Simulate text file inputs using Python's standard library for safer testing; Apply string methods and regular expressions to filter specific lines of data; Clean raw text by removing whitespace, formatting errors, and unwanted characters; Implement modern type hints to write readable and maintainable file-processing code; Structure clean scripts to automate repetitive text-filtering tasks. You will begin with foundational concepts of file manipulation and Python syntax before moving into hands-on text parsing exercises. This course is designed for beginners who want to build practical automation skills, and no previous file-handling experience is required. Start reading and write your first text-filtering script today.