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# System Dependencies

PyGObject not only depends on packages available from PyPI, but also requires certain system dependencies to be installed. Because their version isn’t taken into account by pip’s dependency resolver, you may need to restrict the version of PyGObject itself for the installation to succeed. This lists the minimum version of the system dependencies over time.

3.50.0+:

  - glib: >= 2.80.0

  - libffi: >= 3.0

  - gobject-introspection: >= 1.64.0 (for tests only)

3.46.0+:

  - glib: >= 2.64.0

  - gobject-introspection: >= 1.64.0

  - libffi: >= 3.0

  Example distributions: Ubuntu 20.04, Debian Bullseye, or newer

3.40.0 - 3.44.x:

  - glib: >= 2.56.0

  - gobject-introspection: >= 1.56.0

  - libffi: >= 3.0

  Example distributions: Ubuntu 18.04, or newer