Browse free open source Python Libraries and projects below. Use the toggles on the left to filter open source Python Libraries by OS, license, language, programming language, and project status.

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    MongoDB Atlas runs apps anywhere

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  • 1
    Functional Programming for Python. Provides a small mixin to provide 1) type constraints for named tuples 2) pre/postcondition typechecking for functions 3) syntactical sugar to make your code look pretty (accomplished through a PEP 302 import hook)
    Downloads: 0 This Week
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  • 2
    Pinject

    Pinject

    A pythonic dependency injection library

    Pinject is a lightweight dependency-injection library for Python that favors explicit wiring and testability over magic. Instead of global singletons, you declare providers (bindings) that describe how to construct objects, and Pinject resolves the graph by inspecting call signatures. Its container supports constructor injection and fine-grained scoping so you can share expensive resources while keeping tests isolated. The library leans on Python’s introspection to minimize boilerplate, making it natural to adopt in codebases that already rely on type hints or keyword arguments. Because bindings are just Python functions and classes, refactoring remains straightforward and the DI graph is easy to reason about. Pinject is particularly useful for medium-to-large services where configuration, logging, data clients, and business logic need clean separation without resorting to manual plumbing.
    Downloads: 0 This Week
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  • 3
    To install these libraries, you need to have Python installed on your PC, preferably the latest version. This file only works for Windows.
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  • 4
    Poor Http

    Poor Http

    WSGI Server, WSGI Connector, Python doc generator

    Poor Http Server is standalone wsgi server, which is designed for using python web applications. Unlike other projects, this is not framework, but single server, light wsgi connector, and python doc generator.
    Downloads: 0 This Week
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  • Securden Privileged Account Manager Icon
    Securden Privileged Account Manager

    Unified Privileged Access Management

    Discover and manage administrator, service, and web app passwords, keys, and identities. Automate management with approval workflows. Centrally control, audit, monitor, and record all access to critical IT assets.
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  • 5
    Portfolio-Generator

    Portfolio-Generator

    Portfolios Made Easy, Generate portfolios in 3 easy steps

    A webapp made in Django to generate a portfolio.
    Downloads: 0 This Week
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  • 6
    Pottery

    Pottery

    Redis for humans

    Redis is awesome, but Redis commands are not always intuitive. Pottery is a Pythonic way to access Redis. If you know how to use Python dicts, then you already know how to use Pottery. Pottery is useful for accessing Redis more easily, and also for implementing microservice resilience patterns, and it has been battle-tested in production at scale.
    Downloads: 0 This Week
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  • 7

    Prefix Tree

    A lighting-fast prefix tree and DAWG implementation in C and python

    A lighting-fast prefix tree (trie) and compressed prefix tree (DAWG) implementation. This library can be usefull for longest-prefix matching, code completion, dictionary compression, spell checking.
    Downloads: 0 This Week
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  • 8
    PrettyTensor

    PrettyTensor

    Pretty Tensor: Fluent Networks in TensorFlow

    Pretty Tensor is a high-level API built on top of TensorFlow that simplifies the process of creating and managing deep learning models. It wraps TensorFlow tensors in a chainable object syntax, allowing developers to build multi-layer neural networks with concise and readable code. Pretty Tensor preserves full compatibility with TensorFlow’s core functionality while providing syntactic sugar for defining complex architectures such as convolutional and recurrent networks. The library’s design emphasizes flexibility and modularity, supporting advanced features like default scopes, parameter templates, and variable reuse. It also allows easy integration with custom operations and third-party libraries, making it ideal for both research experimentation and production-grade modeling. By combining TensorFlow’s power with an intuitive builder-style API, Pretty Tensor accelerates model development without sacrificing transparency or control.
    Downloads: 0 This Week
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  • 9
    Professional Programming

    Professional Programming

    A collection of learning resources for curious software engineers

    Professional Programming is a long-running, curated collection of learning resources aimed at helping software engineers grow into well-rounded professionals. It goes far beyond basic “learn to code” material and covers topics like system design, debugging, testing, performance, security, architecture, and software craftsmanship. The list is organized by themes such as coding, design, operations, communication, and career, making it easy to dive into specific aspects of engineering practice. Each resource is hand-picked by the maintainer, focusing on timeless, high-signal articles, talks, and books rather than trendy or shallow content. Because it has been maintained for many years, it also acts as a kind of “canon” of articles that many engineers reference throughout their careers. The repository is especially helpful for self-taught developers or those transitioning from junior to senior roles who want a structured reading roadmap instead of random blog posts.
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    Run applications fast and securely in a fully managed environment

    Cloud Run is a fully-managed compute platform that lets you run your code in a container directly on top of scalable infrastructure.

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  • 10

    ProximityForest

    Efficient Approximate Nearest Neighbors for General Metric Spaces

    A proximity forest is a data structure that allows for efficient computation of approximate nearest neighbors of arbitrary data elements in a metric space. See: O'Hara and Draper, "Are You Using the Right Approximate Nearest Neighbor Algorithm?", WACV 2013 (best student paper award). One application of a ProximityForest is given in the following CVPR publication: Stephen O'Hara and Bruce A. Draper, "Scalable Action Recognition with a Subspace Forest," IEEE Conference on Computer Vision and Pattern Recognition, 2012. This source code is provided without warranty and is available under the GPL license. More commercially-friendly licenses may be available. Please contact Stephen O'Hara for license options. Please view the wiki on this site for installation instructions and examples on reproducing the results of the papers.
    Downloads: 0 This Week
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  • 11
    Prudence is an open source container and framework for scalable web frontends and network services, based on proven REST principles. It comes in several flavors: Python, Ruby, Clojure, JavaScript, PHP and Groovy.
    Downloads: 0 This Week
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  • 12
    Psifas
    A python library for parsing and building of data structures (binary or textual). It is based on the concept of defining data structures in a declarative manner, where complex structures are composed of a hierarchy of simpler ones.
    Downloads: 0 This Week
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  • 13
    PureEnergy is an organized file manager for SuperWikia Super Controller reactors which provide fluent access of each reactor's Sadeic files and other components of the native Super Controller Codec partitions. PureEnergy features IDE & SDK utilities.
    Downloads: 0 This Week
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  • 14
    Py4J enables Python programs to dynamically access arbitrary Java objects. Methods are called as if the Java objects resided in the Python virtual machine. There is no code to generate and no interface to implement for shared objects on both sides.
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  • 15
    PyAnnotation is a Python Library to access and manipulate linguistically annotated corpus files. Supported file formats are Kura XML, Elan XML and Toolbox files. A Corpus Reader API is provided to support statistical analysis within the NLTK.
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  • 16
    PyCNN

    PyCNN

    Image Processing with Cellular Neural Networks in Python

    Image Processing with Cellular Neural Networks in Python. Cellular Neural Networks (CNN) are a parallel computing paradigm that was first proposed in 1988. Cellular neural networks are similar to neural networks, with the difference that communication is allowed only between neighboring units. Image Processing is one of its applications. CNN processors were designed to perform image processing; specifically, the original application of CNN processors was to perform real-time ultra-high frame-rate (>10,000 frame/s) processing unachievable by digital processors.
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  • 17
    PyComputerAlgebra is a pure Python implementation of a computer algebra library.
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  • 18
    Fully OO python PDF generation library.
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  • 19

    PyDoodles

    Assorted Mini-Modules for Python

    PyDoodles is a set of assorted "mini-modules" for the Python programming language. It's a collection of small ideas combined to create reusable code that is bound to come in handy for someone somewhere.
    Downloads: 0 This Week
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  • 20
    PyExcelerate

    PyExcelerate

    Accelerated Excel XLSX Writing Library for Python 2/3

    Accelerated Excel XLSX writing library for Python. PyExcelerate is a Python for writing Excel-compatible XLSX spreadsheet files, with an emphasis on speed.
    Downloads: 0 This Week
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  • 21

    PyGCF

    Process GURPS Character Assistant GCF files to Python structures

    The GURPS Character Assistant program stores its core data as GCF files. These files contain a descriptions of entities and relationships, commands for manipulating them and rules on how to satisfy constraints. Unfortunately, said program is only available for Windows, doesn't support any kind of automation for generation of NPCs, doesn't function under WINE, and is very, very slow. This module is intended to provide a basis for rectifying those problems.
    Downloads: 0 This Week
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  • 22
    PyJNIus

    PyJNIus

    Access Java classes from Python

    Pyjnius is a Python library for accessing Java classes. A Python module to access Java classes as Python classes using the Java Native Interface (JNI). Warning: the pypi name is now pyjnius instead of jnius. When you use autoclass, it will discover all the methods and fields of the class and resolve them. You can use the signatures method of JavaMethod and JavaMultipleMethod, to inspect the discovered signatures of a method of an object.
    Downloads: 0 This Week
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  • 23
    PyLibrary

    PyLibrary

    Libraries for Python developers.

    Development in Python (be it website or an App development or implementation of an automation framework) always involves certain operations like handling db queries, operations on web, development of data structures, windows operations (handing services, registries), logging and many more... What, if you have these libraries handy with you all the time? Just import and start using them.. In comes PyLibrary.. PyLibrary is a collection of infrastructure libraries that aid faster development in Python. These libraries are well documented, provide robust error handling and are frequently updated/tested for improvements. Chetan Giridhar
    Downloads: 0 This Week
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  • 24
    PyMW is a Python module for parallel master-worker computing in a variety of environments. With the PyMW module, users can write a single program that scales from multicore machines to global computing platforms.
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  • 25
    PyOpenCL

    PyOpenCL

    OpenCL integration for Python, plus shiny features

    PyOpenCL is a Python wrapper for the OpenCL framework, providing seamless access to parallel computing on CPUs, GPUs, and other accelerators. It enables developers to harness the full power of heterogeneous computing directly from Python, combining Python’s ease of use with the performance benefits of OpenCL. PyOpenCL also includes convenient features for managing memory, compiling kernels, and interfacing with NumPy, making it a preferred choice in scientific computing, data analysis, and machine learning workflows that demand acceleration.
    Downloads: 0 This Week
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