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    Requirement

    A Python package from PyPI that an integration needs, listed with a pinned version in its manifest.

    In code
    "requirements" in manifest.json
    Also
    requirements, dependency

    Code that talks to a specific device or service belongs in a library on PyPI, not in the integration. The integration lists that library as a requirement, and Home Assistant installs it when needed.

    Requirements are pinned to an exact version, so every installation runs the same code.

    Related terms

    • ManifestThe `manifest.json` file of an integration: its domain, name, integration owners, requirements, and how it can be discovered.
    • IntegrationA package of code that connects Home Assistant to a device, service, or protocol, or adds a feature like automations.