Read and write files, CSV, JSON, and pathlib
Open, read, write, and process files in Python. File modes, the with statement, and patterns for working with text and binary data.
Read and write CSV files with the csv module — csv.reader, DictReader, and DictWriter for tabular data processing.
Parse JSON strings, dump Python objects to JSON, pretty-print, and work with JSON files — the format behind every API.
Modern file path handling with Path objects. Join paths, glob for files, check existence — cleaner than os.path for everything.