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No module named 'imghdr' for Python 3.10 and older #22

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rffontenelle opened this issue Feb 4, 2025 · 0 comments · May be fixed by #23

rffontenelle commented Feb 4, 2025 •

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Could not import extension sphinx.builders.epub3 (exception: No module named 'imghdr')

This is happening because actions/setup-python is using Python 3.13 binary (latest version available in ubuntu-latest, recently updated to 24.04) and 'imghdr' was removed in Python 3.13 (See imghdr in 3.12 docs).

Pinning actions/setup-python to use Python 3.12 is the easiest way out.

rffontenelle linked a pull request

that will close this issue

Pin Python 3.12 in actions/setup-python #23

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