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Pip (Python)

74 cheat sheets

Pip Packages#

Per-package cheat sheets for third-party PyPI packages. Slugs use the form pip-<name> (e.g. pip-requests, pip-rich) so the same package name in another ecosystem never collides with these.

For the package managers themselves — pip, uv, poetry, pipx — see the Python section.

Many packages here ship a command-line binary in addition to their Python API. Those have a companion CLI article in Linux (cross-platform CLIs live there by convention), cross-linked via related:.

anyio — Structured Concurrency Across asyncio and trio

Package-level reference for anyio on PyPI — install, version policy, task groups, cancel scopes, and the API that runs identically on asyncio and trio.

May 31, 2026
pip package async concurrency networking

attrs — Classes Without Boilerplate

Package-level reference for attrs on PyPI — install, @define vs @attr.s, validators, converters, and comparison with dataclasses.

May 31, 2026
pip package dataclass language

autogen-agentchat — Microsoft AutoGen v0.4 Multi-Agent SDK

Package-level reference for the autogen-agentchat / autogen-core / autogen-ext family on PyPI plus the legacy pyautogen — install, rename history, versioning, and alternatives.

May 31, 2026
pip package llm ai agents multi-agent microsoft

beautifulsoup4 — HTML/XML Parsing Library

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

May 31, 2026
pip package scraping html parsing

black — The Uncompromising Python Formatter

Package-level reference for black on PyPI — install variants, version policy, the [d] and [jupyter] extras, and how it relates to ruff format.

May 31, 2026
pip package formatting code-quality

boto3 — AWS SDK for Python

Package-level reference for boto3 on PyPI — install, sessions, clients vs resources, paginators, version policy, and alternatives.

May 31, 2026
pip package aws cloud sdk

certifi — Mozilla CA Certificate Bundle

Package-level reference for certifi on PyPI — what the bundle contains, install, integration with requests / urllib3 / ssl, alternatives.

May 31, 2026
pip package tls security http

cffi — C Foreign Function Interface for Python

Package-level reference for cffi on PyPI — install, ABI vs API modes, build patterns, and integration with system libraries.

May 31, 2026
pip package binding c ffi

charset-normalizer — Character Encoding Detection

Package-level reference for charset-normalizer on PyPI — what it does, install, integration with requests, version policy, and alternatives.

May 31, 2026
pip package encoding text http

chromadb — Embedded Vector Database

Package-level reference for chromadb on PyPI — install variants, server/client split, embedding-function extras, and alternative vector stores.

May 31, 2026
pip package ai vector-search rag embeddings

click — Composable Command-Line Builder

Package-level reference for the click CLI toolkit on PyPI — install, version policy, extras, and alternatives.

May 31, 2026
pip package cli terminal

crewai — Role-Based Multi-Agent Orchestration

Package-level reference for the crewai library on PyPI plus the crewai-tools companion — install, versioning, and multi-agent alternatives.

May 31, 2026
pip package llm ai agents multi-agent

cryptography — Recipes and Hazmat for Python Crypto

Package-level reference for the cryptography library on PyPI — install, version policy, Fernet, asymmetric keys, X.509, and TLS contexts.

May 31, 2026
pip package crypto security tls

dagster — Asset-Oriented Data Orchestration

Package-level reference for Dagster on PyPI — install variants, the dagster-* plugin family, version policy, and alternatives.

May 31, 2026
pip package orchestration pipelines

django — The Batteries-Included Web Framework

Package-level reference for Django on PyPI — install variants, LTS release cadence, ecosystem companions, and alternatives.

May 31, 2026
pip package web api

dspy — Declarative LLM Programming

Package-level reference for DSPy on PyPI — the dspy / dspy-ai rename, install variants, version policy, and alternatives.

May 31, 2026
pip package ai llm

duckdb — Embedded Analytical SQL

Package-level reference for duckdb — install, versioning, extensions, and gotchas. In-process columnar OLAP for Python.

May 31, 2026
pip package duckdb sql analytics

fastapi — Modern ASGI API Framework

Package-level reference for FastAPI on PyPI — install variants, version policy, the `[all]` extra, ecosystem companions, and alternatives.

May 31, 2026
pip package web async api

flask — The WSGI Microframework

Package-level reference for Flask on PyPI — install variants, version policy, extension ecosystem, and alternatives.

May 31, 2026
pip package web api

fsspec — Filesystem Spec Abstraction

Package-level reference for fsspec on PyPI — install, protocols, chained URIs, caching layers, and integration with pandas / dask.

May 31, 2026
pip package fs storage

google-genai — Google Gemini SDK (successor to google-generativeai)

Package-level reference for google-genai (the current Gemini SDK) and its predecessor google-generativeai — install, auth, versioning, and alternatives.

May 31, 2026
pip package llm ai google gemini api

guidance — Programmatic LLM Output Control

Package-level reference for the guidance library on PyPI — install, LLM-provider extras, versioning, and alternatives like instructor and outlines.

May 31, 2026
pip package llm ai structured-output prompting

haystack-ai — LLM Pipelines from deepset

Package-level reference for haystack-ai on PyPI — install variants, the farm-haystack v1 → haystack-ai v2 rename, integrations, and alternative frameworks.

May 31, 2026
pip package ai rag agents

httpx — Async-Capable HTTP Client

Package-level reference for httpx on PyPI — install variants, version policy, extras, transport options, and alternatives.

May 31, 2026
pip package http async networking

idna — Internationalised Domain Names

Package-level reference for idna on PyPI — IDNA2008 vs UTS46, encode/decode, install, integration with requests / urllib3, alternatives.

May 31, 2026
pip package dns unicode networking

importlib-metadata — Backport of stdlib importlib.metadata

Package-level reference for importlib-metadata on PyPI — install, distribution lookups, entry points, and the stdlib relationship from Python 3.10+.

May 31, 2026
pip package language

jinja2 — Python Template Engine

Package-level reference for Jinja2 on PyPI — install, version policy, autoescape gotchas, sandboxing, and the template features behind Flask, Ansible, and Sphinx.

May 31, 2026
pip package template web rendering

jupyter — Meta-Package for Interactive Notebooks

Package-level reference for the jupyter meta-package on PyPI — install variants, what it pulls in, version policy, and alternatives.

May 31, 2026
pip package notebooks interactive data

langchain — LLM Application Framework Family

Package-level reference for the langchain family on PyPI — install variants, partner packages, version churn, and alternatives.

May 31, 2026
pip package llm ai langchain agents rag

langsmith — LLM Observability SDK

Package-level reference for the langsmith SDK on PyPI — install, versioning, env-var setup, and observability alternatives.

May 31, 2026
pip package llm ai observability evaluation tracing

litestar — High-Performance ASGI Framework

Package-level reference for Litestar on PyPI — install variants, version policy, the `[full]` extra, ecosystem companions, and alternatives.

May 31, 2026
pip package web async api

loguru — Zero-Config Structured Logging

Package-level reference for loguru on PyPI — install variants, version policy, and how it coexists with (does not replace) the stdlib logging module.

May 31, 2026
pip package logging debugging

markupsafe — Safe String Escaping for HTML/XML

Package-level reference for markupsafe on PyPI — install, the Markup class, escape semantics, and its role as a Jinja2/Flask/Django dependency.

May 31, 2026
pip package template web security

matplotlib — Foundational Python Plotting Library

Package-level reference for matplotlib on PyPI — install variants, backends, version policy, extras, and alternatives.

May 31, 2026
pip package plotting visualization data

modin — Drop-in Parallel pandas

Package-level reference for modin — install, backend extras, versioning, and gotchas. Speeds up existing pandas code with a one-line import swap.

May 31, 2026
pip package modin pandas parallel

mypy — Reference Static Type Checker for Python

Package-level reference for mypy on PyPI — install variants, Python compat, the types-* stub-package ecosystem, and alternatives.

May 31, 2026
pip package typing static-analysis

numpy — N-Dimensional Array Foundation

Package-level reference for numpy — install, versioning, ABI breaks, extras, and gotchas. The bedrock of the Python scientific stack.

May 31, 2026
pip package numpy arrays scientific

packaging — Version Parsing and Requirement Specifiers

Package-level reference for packaging on PyPI — Version, SpecifierSet, Requirement, markers, install, alternatives.

May 31, 2026
pip package versioning metadata pep

pandas — DataFrames for Python

Package-level reference for pandas — install, versioning, Python compatibility, extras, and gotchas. The de-facto DataFrame library on PyPI.

May 31, 2026
pip package pandas dataframes data

Pillow — Friendly PIL Fork for Image I/O

Package-level reference for Pillow on PyPI — install variants, format-specific native deps, version policy, and alternatives.

May 31, 2026
pip package images imaging filesystem

platformdirs — Cross-Platform User Directories

Package-level reference for platformdirs on PyPI — install, version policy, alternatives, and the per-OS path conventions it returns.

May 31, 2026
pip package paths filesystem configuration

pluggy — Plugin Framework Behind pytest

Package-level reference for pluggy on PyPI — install, version policy, alternatives, and the hookspec/hookimpl model that powers pytest, tox, and devpi.

May 31, 2026
pip package plugin extensibility entry-points

polars — Fast DataFrames on Rust + Arrow

Package-level reference for polars — install, versioning, extras, and gotchas. The Rust-powered Arrow-native alternative to pandas.

May 31, 2026
pip package polars dataframes arrow

pre-commit — Multi-Language Git-Hook Framework

Package-level reference for pre-commit on PyPI — install variants, hook-pinning model, and how it composes with ruff, black, and mypy.

May 31, 2026
pip package git-hooks code-quality

prefect — Python Workflow Orchestration

Package-level reference for Prefect on PyPI — install variants, version policy, cloud-vs-OSS extras, and alternatives.

May 31, 2026
pip package orchestration pipelines

protobuf — Google Protocol Buffers for Python

Package-level reference for the protobuf package on PyPI — install, backend selection (upb / pure-Python / C++), .proto compilation, and gRPC integration.

May 31, 2026
pip package serialization rpc

pycparser — Pure-Python C Parser

Package-level reference for pycparser on PyPI — install, AST walking, fake stdlib headers, and use as a cffi dependency.

May 31, 2026
pip package binding c

pydantic — Type-Driven Data Validation

Package-level reference for Pydantic on PyPI — install variants, v1 vs v2 split, optional extras, and alternatives.

May 31, 2026
pip package validation json

pygments — Syntax Highlighter Library

Package-level reference for Pygments on PyPI — install, version policy, lexers, formatters, and the pygmentize CLI it ships.

May 31, 2026
pip package syntax-highlighting formatting docs

pytest — The De-Facto Python Test Framework

Package-level reference for pytest on PyPI — install variants, version policy, the pytest-* plugin ecosystem, and alternatives.

May 31, 2026
pip package testing tdd

python-dateutil — Date Parsing, Deltas, and Recurrence

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

May 31, 2026
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.

May 31, 2026
pip package yaml config parsing

qdrant-client — Python Client for Qdrant

Package-level reference for qdrant-client on PyPI — install variants, server version matching, gRPC vs HTTP, fastembed extras, and alternatives.

May 31, 2026
pip package ai vector-search rag embeddings

ragas — RAG Evaluation Framework

Package-level reference for ragas on PyPI — install variants, LLM-as-judge dependencies, metric churn, and alternative evaluators.

May 31, 2026
pip package ai rag evaluation

reflex — Full-Stack Python Web Framework

Package-level reference for reflex on PyPI — install variants, Node.js requirement, version policy, and alternatives.

May 31, 2026
pip package web fullstack ui

requests — The Most-Downloaded Python Package

Package-level reference for the requests HTTP client on PyPI — install variants, version policy, extras, and alternatives.

May 31, 2026
pip package http networking

rich — Beautiful Terminal Output for Python

Package-level reference for rich on PyPI — install variants, single-file design, version policy, and alternatives.

May 31, 2026
pip package terminal cli tui

ruff — Rust-Powered Python Linter & Formatter

Package-level reference for ruff on PyPI — install variants, fast-moving version policy, and how a single binary subsumes flake8, isort, pyupgrade, and black.

May 31, 2026
pip package linting formatting code-quality

scikit-learn — Classical Machine Learning

Package-level reference for scikit-learn — install, versioning, extras, and gotchas. The de-facto classical-ML library on PyPI.

May 31, 2026
pip package scikit-learn ml modelling

scipy — Scientific Algorithms on NumPy

Package-level reference for scipy — install, versioning, submodules, license caveats, and gotchas. Optimization, statistics, signal processing, and linear algebra.

May 31, 2026
pip package scipy scientific statistics

semantic-kernel — Microsoft's LLM Orchestration SDK

Package-level reference for semantic-kernel on PyPI — install variants, the Python vs .NET split, provider extras, and alternative frameworks.

May 31, 2026
pip package ai agents async

sentence-transformers — Embedding & Reranking Models

Package-level reference for the sentence-transformers library on PyPI — install, transformers/torch deps, model registry, and embedding alternatives.

May 31, 2026
pip package llm ai embeddings rag huggingface

six — Python 2/3 Compatibility (Mostly Legacy in 2026)

Package-level reference for six on PyPI — what it did, why it still appears in dependency trees, and why new code should avoid it.

May 31, 2026
pip package compatibility legacy python2

SQLAlchemy — The Python SQL Toolkit & ORM

Package-level reference for SQLAlchemy on PyPI — install variants, dialect drivers, version policy, extras, and alternatives.

May 31, 2026
pip package orm sql database

sqlmodel — Pydantic + SQLAlchemy Fusion

Package-level reference for SQLModel on PyPI — install, version policy, dependencies, and alternatives.

May 31, 2026
pip package orm sql database

streamlit — Data Apps Framework on PyPI

Package-level reference for the streamlit framework on PyPI — install variants, version policy, extras, and alternatives.

May 31, 2026
pip package web dataviz ui

tqdm — Fast, Extensible Progress Bars

Package-level reference for tqdm on PyPI — install variants, notebook extra, version policy, and alternatives.

May 31, 2026
pip package progress cli async

transformers — Hugging Face Model Library

Package-level reference for the Hugging Face transformers library on PyPI — install extras, backend choice, versioning, and alternatives.

May 31, 2026
pip package llm ai huggingface nlp ml

trulens-eval — LLM App Evaluation and Tracing

Package-level reference for trulens-eval on PyPI — install variants, the trulens umbrella rename, framework extras, and alternative evaluators.

May 31, 2026
pip package ai rag evaluation observability

typer — Type-Hint-Driven CLI Framework

Package-level reference for the Typer CLI library on PyPI — install variants, version policy, extras, and alternatives.

May 31, 2026
pip package cli terminal

typing-extensions — Backported and Experimental Typing Features

Package-level reference for typing-extensions on PyPI — what's backported, install, version policy, and migration to stdlib.

May 31, 2026
pip package typing mypy backport

unstructured — Document Parsing for RAG Pipelines

Package-level reference for unstructured on PyPI — install variants, the huge extras tree, system-level dependencies, and alternative parsers.

May 31, 2026
pip package ai rag filesystem

urllib3 — Low-Level HTTP Client

Package-level reference for urllib3 on PyPI — connection pooling, retries, TLS, version policy, and alternatives.

May 31, 2026
pip package http networking tls

weaviate-client — Python Client for Weaviate

Package-level reference for weaviate-client on PyPI — install variants, the v3 → v4 API split, gRPC, and alternative vector stores.

May 31, 2026
pip package ai vector-search rag embeddings