PyPI Ranking home
1st psycopg2

Python-PostgreSQL Database Adapter

246,740
2nd SQLAlchemy

Database Abstraction Library

230,095
3rd six

Python 2 and 3 compatibility utilities

150,658
4th pbr

Python Build Reasonableness

150,133
5th pyasn1

ASN.1 library for Python

132,271
6th certifi

Mozilla's SSL Certs.

95,303
7th rsa

Pure-Python RSA implementation

95,103
8th setuptools

Download, build, install, upgrade, and uninstall Python packages -- easily!

94,848
9th requests

Python HTTP for Humans.

76,701
10th bcdoc

ReST document generation tools for botocore.

72,730
11th cffi

Foreign Function Interface for Python calling C code.

71,924
12th pycparser

C parser in Python

70,477
13th argparse

Python command-line parsing library

61,225
14th docutils

Docutils -- Python Documentation Utilities

54,291
15th awscli

Universal Command Line Environment for AWS.

50,081
16th boto

Amazon Web Services Library

47,248
17th pika

Pika Python AMQP Client Library

46,980
18th pycrypto

Cryptographic modules for Python.

46,131
19th virtualenv

Virtual Python Environment builder

45,087
20th ecdsa

ECDSA cryptographic signature library (pure python)

44,455
21st python-dateutil

Extensions to the standard python 3.0+ datetime module

43,316
22nd PyYAML

YAML parser and emitter for Python

43,179
23rd MarkupSafe

Implements a XML/HTML/XHTML Markup safe string for Python

42,338
24th Jinja2

A small but fast and easy to use stand-alone template engine written in pure python.

41,942
25th pip

pip installs packages. Python packages. An easy_install replacement

41,062
26th botocore

Low-level, data-driven core of boto 3.

40,151
27th simplejson

Simple, fast, extensible JSON encoder/decoder for Python

39,175
28th jmespath

JSON Matching Expressions

38,909
29th pyflakes

passive checker of Python programs

35,862
30th distribute

Easily download, build, install, upgrade, and uninstall Python packages

35,421
31st wincertstore

Python module to extract CA and CRL certs from Windows' cert store (ctypes based).

34,006
32nd Pillow

Python Imaging Library (fork)

33,697
33rd pytz

World timezone definitions, modern and historical

33,196
34th graphite-web

Enterprise scalable realtime graphing

32,587
35th nose

nose extends unittest to make testing easier

31,420
36th coverage

Code coverage measurement for Python

30,964
37th iso8601

Simple module to parse ISO 8601 dates

29,959
38th PrettyTable

A simple Python library for easily displaying tabular data in a visually appealing ASCII table format.

26,281
39th Django

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

23,749
40th paramiko

SSH2 protocol library

23,341
41st selenium

Python bindings for Selenium

20,027
42nd pep8

Python style guide checker

19,865
43rd astroid

rebuild a new abstract syntax tree from Python's ast

19,643
44th mock

A Python Mocking and Patching Library for Testing

18,691
45th Werkzeug

The Swiss Army knife of Python web development

18,542
46th python-instagram

Instagram API client

18,189
47th lxml

Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API.

18,039
48th pymongo

Python driver for MongoDB

17,929
49th redis

Python client for Redis key-value store

17,850
50th supervisor

A system for controlling process state under UNIX

16,971