Packages
lbt-dragonfly is a meta-package that installs all Dragonfly core libraries and extensions together, providing a single installation point for urban building energy simulation, daylighting analysis, and related tools.
lbt-honeybee is a meta-package that installs the complete Honeybee ecosystem—core libraries and extensions for radiance, energy, and display—plus all required Ladybug dependencies in one command.
LCM provides publish/subscribe message passing and automatic data marshalling for real-time inter-process communication with low latency and high bandwidth efficiency.
Converts code coverage reports from lcov format to Cobertura XML format, enabling CI servers to aggregate and analyze coverage metrics across packages, classes, functions, and individual lines.
ldap3 is a pure Python LDAP V3 client library that implements RFC 4510, providing both low-level LDAP operations and a high-level abstraction layer for directory queries and authentication.
Install it if you need to authenticate against or query LDAP directories.
Collects and exports Active Directory information via LDAP in human-readable HTML, JSON, CSV, and greppable formats for domain reconnaissance.
Ldaptor is a pure-Python LDAP client library built on Twisted that handles LDAP protocol operations, filter parsing, and directory queries without compiled dependencies.
Parses LIN Description Files (LDF) to extract signal and frame definitions, and encodes/decodes messages according to those definitions.
However, be aware that maintenance is aging (last release 564 days ago) and the library is pre-release, so pin versions in production and test upgrades carefully.
Provides decoders for low-density parity check (LDPC) codes, including belief propagation, ordered statistics decoding, union-find matching, and hybrid approaches for classical and quantum error correction.
However, the aging maintenance status (249 days since last release) and beta classification mean you should verify that the package meets your specific decoding…
Leafmap enables interactive geospatial mapping and analysis in Jupyter notebooks with minimal code, combining vector and raster data visualization, interactive editing, and backend analysis tools.
Provides an MCP server that exposes the Lean theorem prover to LLM agents via the Language Server Protocol, enabling programmatic access to proof states, diagnostics, and theorem search tools.
Install it if you use Cursor, Claude Code, or similar platforms with Lean projects.
Interact with a Lean 4 language server running in a subprocess via Python, querying and modifying Lean files through the Language Server Protocol.
However, it is very new (first release January 2025), so expect potential API changes and incomplete feature coverage; the Windows support caveat and experimental…
Learnosity SDK provides Python bindings to create signed security requests for Learnosity APIs and interact with the Data API for assessment and educational content management.
Leather is a lightweight Python charting library for quick, no-frills data visualization. It generates charts without requiring perfect styling or extensive configuration.
Encodes and decodes integers using LEB128 (Little Endian Base 128), a variable-length compression format used in DWARF debug files and WebAssembly binary encoding.
Controls generic unbranded Bluetooth LE LED devices sold under names like Triones, LEDBLE, LEDBlue, QHM, and Dream, using a shared protocol family.
Provides static UI files for serving an OpenAPI documentation interface at `/ledoc` in any web framework that can mount static directories.
However, dormant maintenance means you should verify the UI works with your OpenAPI schema version and accept that issues may not be addressed.
Lefthook is a Git hooks manager that installs and runs custom commands automatically before or after Git operations, supporting parallel execution across Node.js, Ruby, and other project types.
Provides a decorator to wrap legacy function APIs, allowing you to convert positional parameters to keyword-only while maintaining backward compatibility with a deprecation warning.
Provides the cgi and cgitb modules removed from Python 3.13's standard library, allowing existing CGI scripts to run on newer Python versions without modification.
Not recommended for new projects.
A Python client library for interacting with an inventory management API, auto-generated from OpenAPI specifications with support for certificate management, cloud instances, compliance, and container image operations.
Implements the Leiden community detection algorithm for graphs, exposing a C++ implementation to Python via igraph for partitioning networks into communities using multiple optimization methods.
Lemmatizes and inflects English words using dictionary lookup and neural network rules, with support for Universal Dependencies and Penn Treebank tags, and optional integration with spaCy.
However, the dormant maintenance status (last update 2022-10-02) means no active development or bug fixes; install only if the current feature set meets your needs…
Lenses provides a functional approach to reading and modifying nested data structures without mutating the original data, using composable lens operations inspired by Haskell.
Lepton AI is a Python framework for building and deploying AI services from research and modeling code, with built-in support for launching HuggingFace models, autobatching, background jobs, and a client for calling services as native Python functions.
LeRobot provides a unified PyTorch framework for training, deploying, and managing robotic policies and datasets across diverse hardware platforms, from low-cost arms to humanoids.
Compiles LESS stylesheets to CSS using Python, without requiring Node.js. Supports variables, mixins, nesting, color functions, and guard expressions, but not JavaScript evaluation.
Letta is a framework for building LLM agents with persistent memory that can learn and improve over time, accessible both as a local CLI tool and through a Python API for integration into applications.
However, the large dependency tree and requirement for an external API key (for the cloud API) or Node.js 18+ (for the CLI) may be friction points.
Provides a Python client library for the Letta REST API with type-safe request and response handling, supporting both synchronous and asynchronous operations.
Install it if you need to programmatically interact with Letta agents or archives from Python.
Leval evaluates limited expressions safely by parsing them into an AST and walking it in Python, supporting depth and time limits alongside optional variable and function mappings.
Install it if you need to evaluate user or config expressions safely; skip it if you only need literal Python values.
Levenshtein computes string edit distances, similarities, and related operations like approximate string averaging through a C extension for fast performance.
Install it if you need edit-distance operations and can accept the GPL-2.0-or-later copyleft requirement; avoid it if your project must remain proprietary without GPL…
Calculates lexical diversity metrics (TTR, MTLD, HDD, and others) on tokenized text to measure vocabulary richness and variation.
However, verify compatibility with your Python version before relying on it in production, and consider whether a more actively maintained alternative better fits…
Generates lexically ordered numerical IDs that maintain sort order whether compared as integers or strings, useful for build numbers and version tags that need to sort correctly without special parsing.
Provides a Python interface to the LexisNexis Metabase API for searching and retrieving articles, with support for rate-limit tracking and DataFrame conversion.
However, dormancy since the last release means no active maintenance—verify that the underlying Metabase API remains compatible and that you can obtain a valid API…
LFX is a lightweight command-line tool that executes Langflow AI flows from JSON files without requiring the full Langflow package, serving them as stateless FastAPI endpoints or running them locally.
However, verify the license terms first, and confirm that your flows do not depend on persistent state (saved flows, message history, user management) before…
Lhotse prepares multimodal (speech, audio, video, image, text) data for machine learning model training with flexible pipelines, on-the-fly augmentation, and efficient data loading.
Install it if you are building speech, audio, or multimodal training pipelines; skip it if you only need simple audio I/O without data augmentation or complex dataset…
lia-web is a deprecated shim package that re-exports cross-web under the lia namespace for backwards compatibility; new users should install cross-web directly instead.
No, not for new projects.
Reads and writes ARFF (Attribute-Relation File Format) files, a standard format for machine learning datasets, converting them to and from Python dictionaries and lists.
However, its abandoned status since 2020 makes it risky for new projects—install only if you need ARFF support for legacy datasets or existing workflows, and consider…
Provides zero-dependency Python bindings to call Autocode StdLib microservices, allowing you to invoke remote functions as if they were local methods.
Provides portable signal handling, exception-to-exit-code mapping, and clean error printing for Click CLI applications across platforms.