Packages
Provides lists of Python standard library module names for Python versions 2.6 through 3.14, useful for distinguishing standard library imports from third-party packages.
Provides a static listing of all known modules in Python's standard library, with separate lists for each major CPython release dating back to Python 2.3.
Install it if you're building linters, import sorters, or any tool that needs to reliably distinguish standard library modules from third-party ones across multiple…
Provides a typed Python client for the Steel REST API with both synchronous and asynchronous interfaces, auto-pagination, and comprehensive error handling.
Install it if you need to call the Steel API from Python; the typed interface and async support make it substantially easier than raw HTTP requests.
Stellar SDK provides Python APIs to build and sign transactions, query network history, and communicate with Stellar Horizon and Stellar RPC servers for blockchain applications.
Stem is a Python controller library for interacting with Tor, allowing applications to query and command Tor instances over the control protocol.
The copyleft LGPLv3 license requires careful review if you plan to distribute derivative work.
Builds and orchestrates machine learning workflows on AWS Step Functions and SageMaker directly from Python code, without manual AWS service provisioning.
stestr is a parallel test runner for Python unittest suites that distributes test execution across multiple processes and maintains a history of test runs using the subunit protocol.
Install it if your project runs unittest suites and would benefit from faster parallel execution or historical test analysis.
Stevedore manages dynamic plugin loading for Python applications by wrapping setuptools entry points, providing manager classes that handle common patterns for discovering and loading extensions at runtime.
Install it if your application needs to support dynamic extensions or if you are building a framework intended for third-party plugins.
Shifts the pitch and timbre of audio signals using Short-Time Fourier Transform (STFT) analysis, with optional formant preservation to avoid the Mickey Mouse effect.
Python SDK for interacting with Stigg Sidecar, a service for managing customer entitlements and feature access control.
However, verify the license terms before committing—the metadata shows 'unclear' status with no published license text.
Stim is a fast simulator for quantum stabilizer circuits, providing interactive simulation, high-speed sampling, and independent exploration of quantum states through TableauSimulator, Circuit compilation, and Pauli/Tableau data types.
Stirrup is a lightweight Python framework for building LLM-powered agents that can execute code, search the web, process files, and call external tools with minimal scaffolding.
Parses, manipulates, and generates STIX v1.2.0 (Structured Threat Information eXpression) content in Python, enabling programmatic work with threat intelligence data structures.
However, it is abandoned and will not receive updates.
Serializes and deserializes STIX 2 JSON content, providing Python APIs for creating, parsing, and manipulating cyber threat intelligence objects with support for data markings, versioning, and ID resolution across multiple sources.
Install it if you need to produce, consume, or transform STIX 2 JSON in a Python application; skip it if you don't work with CTI standards.
Validates the syntax of STIX 2 Pattern expressions used in cyber threat intelligence to describe observable conditions, available as both a command-line tool and Python library.
However, the aging maintenance status (184 days since last release) and Alpha development status mean you should verify that it handles your specific pattern syntax…
Validates STIX 2.x JSON documents against the STIX 2.1 specification, checking both mandatory requirements via JSON schemas and recommended best practices via Python functions.
Wraps the Stockfish chess engine to let Python code query best moves, evaluate positions, and validate chess notation without reimplementing engine logic.
Adds technical analysis indicators and statistics to pandas DataFrames for stock market data, including moving averages, momentum, trend, volatility, and volume calculations.
Install it if you need to add technical analysis to pandas-based financial workflows; skip it only if you require indicators not in its supported list or need…
A Python client library for connecting to STOMP messaging servers (ActiveMQ, RabbitMQ, Artemis) and sending or receiving messages using the STOMP protocol.
Install it if you need to communicate with a STOMP message broker.
Stone is an interface description language and code generator that lets you define an API specification once and automatically generate client libraries and server code in multiple programming languages.
Adds stop-sequence support to Huggingface Transformers text generation, allowing you to halt output when specified text patterns appear.
Provides curated stop-word lists for multiple languages, enabling filtering of common words in natural language processing and text analysis tasks.
Install it if you need multilingual stop-word filtering for NLP or text preprocessing; the aging maintenance status is not a blocker for a stable, feature-complete…
Provides context managers and decorators to enforce timeouts on code blocks and function calls, and raise exceptions asynchronously in other threads.
Provides a simple stopwatch timer that measures elapsed time using Python's high-resolution performance counter, with methods to start, stop, reset, and retrieve the duration.
However, note that maintenance is dormant—no updates since 2022-09-04—so expect no bug fixes or Python version support beyond what is already declared.
Provides stopword lists for multiple languages identified by ISO 639-1 codes, returning them as sets for filtering common words from text processing tasks.
Provides Python classes and functions to interact with enterprise storage arrays, Fibre Channel switches, and servers.
Async Python client library for uploading, downloading, and managing files in Supabase Storage buckets via HTTP.
STPyV8 embeds Google V8 JavaScript engine into Python, allowing you to run JavaScript code from Python and call Python code from JavaScript within the same process.
However, do not rely on it for active maintenance or security patches; use it only in contexts where you control the JavaScript code being executed or can audit it…
stqdm wraps tqdm progress bars for Streamlit apps, displaying iteration progress in the Streamlit UI instead of or alongside terminal output.
Converts string representations like 'yes', 'true', '1', 'no', 'false', '0' to Python boolean values, case-insensitive.
Strands Agents is a Python SDK for building AI agents that work with multiple model providers and integrates with Model Context Protocol (MCP) servers to access pre-built tools.
Strands Agent Builder is a terminal-based toolkit for building, testing, and extending custom AI agents and tools with a model-driven approach using Claude and Amazon Bedrock.
However, the repository is archived and no longer maintained as of the fact sheet date; you should verify that its dependencies remain viable and that you are…
Strands Evals SDK provides a comprehensive evaluation framework for testing and measuring AI agents and LLM applications, supporting output validation, trajectory analysis, trace-based evaluation, and automated experiment generation.
Provides ready-to-use tools for AI agents to perform file operations, web search, AWS integration, Slack messaging, Python code execution, and browser automation.
stravalib provides a Python client for authenticating with and querying the Strava V3 API to access activity, club, and athlete data, with built-in support for unit conversion and temporal handling.
Install it if you're working with Strava activity data.
Strawberry GraphQL is a Python library for building GraphQL APIs using Python dataclasses and type annotations, with built-in support for schema definition, dev servers, and framework integrations.
Generates GraphQL types, queries, mutations, and resolvers automatically from Django models with full type safety, including filtering, pagination, ordering, and N+1 query prevention.
Python SDK for server-side integration with Stream Chat, providing APIs to manage users, channels, messages, and chat metadata.
However, if starting a new project, consider the newer `getstream` SDK instead, as stream-chat is in maintenance mode.
Decompresses DEFLATE and DEFLATE64 streams in pure Python, designed to handle streaming data where the compressed content length is unknown or followed by additional data.
Official Python client library for Stream Feeds API, enabling server-side management of newsfeeds and activity streams with support for both synchronous and asynchronous operations.
Install it if you are building a backend that needs to manage newsfeeds or activity streams via Stream's hosted service.