PyRadar

Compare Python libraries fast — transparent, minimal, to the point.

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Featured Packages

Popular Python libraries across different categories.

FastAPI
High-performance async APIs with automatic OpenAPI docs.
web-frameworks
Loguru
Delightful logging for Python with zero-config colorful output.
logging-frameworks
Polars
Lightning-fast DataFrame library with lazy evaluation and multi-threading.
data-analysis-frameworks
Requests
Human-friendly HTTP client.
http-clients-frameworks
LangChain
Modular framework for building LLM apps and agent workflows(Includes LangGraph).
llm-orchestration-frameworks
Streamlit
Turn Python scripts into interactive data web apps in minutes.
app-frameworks
Pytest
Modern testing framework with powerful fixtures, plugins, and concise test syntax.
code-testing-frameworks
Pydantic
Data validation and settings management using Python type hints — creates schemas, validates data, and serializes models.
data-serialization-frameworks
Ruff
Extremely fast Python linter and formatter written in Rust — consolidates rules from Flake8, isort, pyupgrade, and more.
linting-&-formating-frameworks
PRegEx
Programmable Regular Expressions — object-based API for constructing, combining, and managing regex patterns in Python.
regex-frameworks
Weaviate
Open-source vector database and semantic search engine with hybrid queries, schema, and generative search.
vector-database-frameworks
LangSmith
Unified observability & evaluation platform for LLM/agent applications — tracing, dashboards, alerts, feedback & evaluation.
agent-monitoring-frameworks
UV
Ultra-fast Python package & project manager (Rust) that replaces pip/virtualenv/pip-tools/pipx with a single, blazing-speed CLI.
package-manager-frameworks
Argparse*
Python's built-in command-line parsing library (standard library); supports options, flags, subcommands, type conversion, and help text.
cli-frameworks
BeautifulSoup
Python library for pulling data out of HTML and XML files; pairs well with requests, lxml, or html.parser.
web-scraping-frameworks
Airflow
Mature, extensible platform to author, schedule, and monitor workflows as DAGs with a rich UI and huge operator ecosystem.
workflow-orchestration-frameworks
Giskard
Open-source testing & evaluation platform for ML/LLM — test suites, bias/safety checks, and regression testing with a web UI.
llm-evaluation-frameworks
Unstructured
Toolkit for loading and partitioning documents (PDFs, HTML, PPTX, images) into clean text/chunks with metadata for downstream NLP/RAG.
document-parsing-frameworks
FastMCP
The standard Python framework for building MCP servers and clients.
mcp-server-frameworks
Matplotlib
Foundational Python plotting library providing low-level control over static, animated, and interactive visualizations.
simple-visualization-frameworks
FuzzyWuzzy
Classic fuzzy string matching library based on Levenshtein distance; largely superseded by RapidFuzz and archived in 2024.
string-matching-frameworks
Faker
Popular library for generating fake but realistic data such as names, addresses, emails, dates, text, and more for testing and prototyping.
synthetic-data-generation-frameworks
What developers consider
Quick checklist for choosing a library.
Community maturityHow mature and well-documented is the library?
PopularityHow widely adopted is the library?
PerformanceHow fast and efficient is the library for your use case?
EcosystemHow rich is the ecosystem around the library?
Developer ExperienceHow easy is it to learn and use the library?