Ignore errors for sip with no setapi. #20096
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Apparently, this happens (see matplotlib#20040 and related issues) sporadically. We don't care if we can't change the sip API version (if it's already been set), so also stop caring if the `setapi` function doesn't exist. This should simply cause the Qt4 backend to fail correctly later with an `ImportError` instead, and thus fall back to the next backend candidate. Fixes matplotlib#20040.
anntzer
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…096-on-v3.4.x Backport PR #20096 on branch v3.4.x (Ignore errors for sip with no setapi.)
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PR Summary
Apparently, this happens (see #20040 and related issues) sporadically. We don't care if we can't change the sip API version (if it's already been set), so also stop caring if the
setapifunction doesn't exist. This should simply cause the Qt4 backend to fail correctly later with anImportErrorinstead, and thus fall back to the next backend candidate.Fixes #20040.
PR Checklist
pytestpasses).flake8on changed files to check).flake8-docstringsand runflake8 --docstring-convention=all).doc/users/next_whats_new/(follow instructions in README.rst there).doc/api/next_api_changes/(follow instructions in README.rst there).