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PyPI

PyPI is the Python adoption lens

Use this route to separate attention from repeated Python usage. Download estimates reveal which packages keep reappearing in notebooks, services, ML pipelines, and internal automation even when they are not the loudest names online.
PyPI package snapshotUpdated 2026-09-12 11:52 UTC | Next 2026-09-13 02:00 UTC

Most downloaded

openai

24.5M est.

Start here when you want the strongest reuse signal in the Python ecosystem.

Most starred package

openai

244.8K stars

GitHub stars tell you what is visible, not necessarily what is most embedded.

Adoption-to-visibility gap

openai

24.5M est.

A high ratio often means the package is more operationally important than its public mindshare suggests.

Quiet infrastructure

openai

244.8K stars

High Python usage with less headline visibility.

Compare with npmRead methodology

Ranked by estimated weekly PyPI downloads ยท Source: PyPI (estimated)

#PackageStars๐Ÿ“ฅ Downloads
1
openaiโš™๏ธ Production

The official Python library for the openai API

244.8K24.5M est.
2
anthropicโš™๏ธ Production

The official Python library for the anthropic API

244.8K24.5M est.
3
richโš™๏ธ Production

Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal

190.6K19.1M est.
4
langchainโš™๏ธ Production

Building applications with LLMs through composability

182.9K18.3M est.
5
transformersโš™๏ธ Production

Transformers: the model-definition framework for state-of-the-art machine learning models in text, vision, audio, and multimodal models, for both inference and training.

165.2K16.5M est.
6
pytorchโš™๏ธ Production
164.9K16.5M est.
7
gradioโš™๏ธ Production

Python library for easily interacting with trained machine learning models

164.9K16.5M est.
8
pydanticโš™๏ธ Production

Data validation using Python type hints

146.2K14.6M est.
9
numpyโš™๏ธ Production

Fundamental package for array computing in Python

102.9K10.3M est.
10
fastapiโš™๏ธ Production

FastAPI framework, high performance, easy to learn, fast to code, ready for production

102.3K10.2M est.
11
uvicornโš™๏ธ Production

The lightning-fast ASGI server.

102.3K10.2M est.
12
clickโš™๏ธ Production

Composable command line interface toolkit

96.6K9.7M est.
13
djangoโš™๏ธ Production

A high-level Python web framework that encourages rapid development and clean, pragmatic design.

90.8K9.1M est.
14
tensorflowโš™๏ธ Production

TensorFlow is an open source machine learning framework for everyone.

83.1K8.3M est.
15
notebookโš™๏ธ Production

Jupyter Notebook - A web-based notebook environment for interactive computing

80.6K8.1M est.
16
requestsโš™๏ธ Production

Python HTTP for Humans.

80.4K8M est.
17
flaskโš™๏ธ Production

A simple framework for building complex web applications.

74.7K7.5M est.
18
pandasโš™๏ธ Production

Powerful data structures for data analysis, time series, and statistics

73.6K7.4M est.
19
matplotlibโš™๏ธ Production

Python plotting package

73.6K7.4M est.
20
scikit-learnโš™๏ธ Production

A set of python modules for machine learning and data mining

67.2K6.7M est.
21
streamlitโš™๏ธ Production

A faster way to build and share data apps

45.7K4.6M est.
22
blackโš™๏ธ Production

The uncompromising code formatter.

41.8K4.2M est.
23
redisโš™๏ธ Production

Python client for Redis database and key-value store

37.3K3.7M est.
24
poetryโš™๏ธ Production

Python dependency management and packaging made easy.

34.3K3.4M est.
25
seleniumโš™๏ธ Production

Official Python bindings for Selenium WebDriver

31.4K3.1M est.
26
jupyterโš™๏ธ Production

Jupyter metapackage. Install all the Jupyter components in one go.

31.3K3.1M est.
27
tqdmโš™๏ธ Production

Fast, Extensible Progress Meter

31.3K3.1M est.
28
scipyโš™๏ธ Production

Fundamental algorithms for scientific computing in Python

29.3K2.9M est.
29
ipythonโš™๏ธ Production

IPython: Productive Interactive Computing

29.3K2.9M est.
30
celeryโš™๏ธ Production

Distributed Task Queue.

28.9K2.9M est.
31
typerโš™๏ธ Production

Typer, build great CLIs. Easy to code. Based on Python type hints.

28.8K2.9M est.
32
pipโš™๏ธ Production

The PyPA recommended tool for installing Python packages.

25K2.5M est.
33
loguruโš™๏ธ Production

Python logging made (stupidly) simple

24.1K2.4M est.
34
mypyโš™๏ธ Production

Optional static typing for Python

20.6K2.1M est.
35
sqlalchemyโš™๏ธ Production

Database Abstraction Library

18.3K1.8M est.
36
aiohttpโš™๏ธ Production

Async http client/server framework (asyncio)

16.5K1.7M est.
37
httpxโš™๏ธ Production

The next generation HTTP client.

15.9K1.6M est.
38
pytestโš™๏ธ Production

pytest: simple powerful testing with Python

14.5K1.4M est.
39
pillowโš™๏ธ Production

Python Imaging Library (fork)

13.8K1.4M est.
40
gunicornโš™๏ธ Production

WSGI HTTP Server for UNIX

10.7K1.1M est.
41
cryptographyโš™๏ธ Production

cryptography is a package which provides cryptographic recipes and primitives to Python developers.

10K1M est.
42
boto3โš™๏ธ Production

The AWS SDK for Python

9.9K990.1K est.
43
python-dotenvโš™๏ธ Production

Read key-value pairs from a .env file and set them as environment variables

8.9K887.3K est.
44
beautifulsoup4โš™๏ธ Production

Screen-scraping library

5.7K565.4K est.
45
alembicโš™๏ธ Production

A database migration tool for SQLAlchemy.

4.4K438.9K est.
46
tomlโš™๏ธ Production

Python Library for Tom's Obvious, Minimal Language

4.1K410K est.
47
pyyamlโš™๏ธ Production

YAML parser and emitter for Python

2.9K294.2K est.
48
bcryptโš™๏ธ Production

Modern password hashing for your software and your servers

1.5K150.3K est.
49
passlib

comprehensive password hashing framework supporting over 30 schemes

19419.4K est.

Next step after the package scan

Move from the PyPI table into repository detail, compare Python-adjacent tools, or switch registries when you need the cross-ecosystem adoption view.
Compare repositoriesOpen AI/MLSwitch to npm

Learn and methodology

Keep trust-building context reachable, but behind the first data read instead of ahead of it.
GuideMethodologyArticlesWeekly Digest
Package read

How to read PyPI demand without confusing popularity for fit

The top of PyPI often blends data tooling, web frameworks, notebook-era staples, infrastructure helpers, and automation libraries that are deeply embedded in production systems. That mix is exactly why the table is valuable: it shows which packages developers keep returning to, even when broader community conversation is happening elsewhere.

Package data is sourced from PyPI and GitHub APIs. Rankings reflect GitHub stars alongside download estimates, and those signals should be treated as discovery context rather than a certification of package quality.