# fastapi | FastAPI | Knowledge Base | Instagit

FastAPI framework, high performance, easy to learn, fast to code, ready for production

GitHub Stars: 95k

Repository: https://github.com/fastapi/fastapi

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## Articles

### [Architectural Considerations When Choosing Between Flask vs FastAPI: A Technical Comparison](/fastapi/fastapi/what-to-consider-flask-vs-fastapi-architecture)

Compare Flask vs FastAPI for your next project. Discover architectural differences and choose between Flasks mature ecosystem or FastAPIs high performance async capabilities.

- Tags: architecture
- Published: 2026-02-13

### [How to Install FastAPI Using pip: Complete Setup Guide](/fastapi/fastapi/how-to-properly-use-pip-install-fastapi)

Learn how to install FastAPI with pip. Follow our guide for `pip install fastapi` and `pip install "fastapi[all]"` to set up the core framework and optional dependencies easily.

- Tags: getting-started
- Published: 2026-02-12

### [How to Use uvicorn run fastapi from Another Python Module](/fastapi/fastapi/how-to-use-uvicorn-run-fastapi-as-module)

Learn how to use uvicorn run fastapi to launch your FastAPI server programmatically from another Python module. Easily integrate your app by specifying the module and variable name.

- Tags: how-to-guide
- Published: 2026-02-12

### [Why Do FastAPI Background Tasks Block Other Requests?](/fastapi/fastapi/why-fastapi-background-task-blocks-other-requests)

Discover why FastAPI background tasks can block requests. Learn how blocking I/O in tasks impacts server performance and explore solutions for efficient background processing.

- Tags: internals
- Published: 2026-02-12

### [Pydantic V2 Field Validator Equivalent to Values Argument: Accessing Other Fields](/fastapi/fastapi/pydantic-field-validator-values-argument-equivalent-v2)

Learn how to access other fields in Pydantic V2 validators using info.data, the equivalent of V1s values argument. Improve your data validation.

- Tags: how-to-guide
- Published: 2026-02-12