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#parsing (8)

Concepts (1)

Regular Expressions

A pattern-matching mini-language for searching, validating, and rewriting text — implemented (with subtly different dialects) by every modern language and CLI tool.
text pattern-matching scripting parsing web-researched

Cheat sheets (7)

beautifulsoup4 — HTML/XML Parsing Library

Package-level reference for beautifulsoup4 on PyPI — install variants, parser-backend selection (lxml/html5lib/html.parser), and alternatives.
pip package scraping html parsing

python-dateutil — Date Parsing, Deltas, and Recurrence

Package-level reference for python-dateutil on PyPI — parser, relativedelta, rrule, timezone, install, alternatives.
pip package datetime timezone parsing

PyYAML — YAML Parser and Emitter

Package-level reference for PyYAML on PyPI — safe_load vs load, dump, custom tags, install, alternatives like ruamel.yaml.
pip package yaml config parsing

BeautifulSoup — HTML Parsing & Scraping

Parse, search, and mutate HTML/XML with BeautifulSoup 4. Covers parser choice (html.parser/lxml/html5lib), find/find_all/select, tree navigation, attribute access, and pairing with requests/httpx/playwright for end-to-end scraping.
python beautifulsoup scraping html parsing web

datetime — Dates, Times, Timezones

Work with dates, times, and timezones in Python using the stdlib datetime module and zoneinfo. Covers aware vs naive datetimes, ISO-8601 parsing, strftime/strptime, timedelta arithmetic, and DST handling.
python stdlib time timezones parsing data

json — Stdlib JSON Encoder/Decoder

Encode and decode JSON in Python with the stdlib json module. Covers dumps/loads, indent/sort_keys/separators, custom default= and JSONEncoder, object_hook decoding, JSONL streaming, and orjson/ujson/msgspec comparison.
python stdlib json data serialization parsing

unstructured — Document Parsing & Ingestion

Extract structured text from PDFs, Word docs, HTML, images, and more with the unstructured library. Covers partitioning, chunking, cleaning, metadata, and pipeline integrations.
python unstructured pdf parsing ingestion rag document etl