$ pip check stapler 1.0.0 requires pypdf2, which is not installed. I guess you need to replace the entry in setup.py/setup.cfg/pyproject.toml as well.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=4c8a4c689954a0ea85ede33f905c148b996e95ec commit 4c8a4c689954a0ea85ede33f905c148b996e95ec Author: Ben Kohler <bkohler@gentoo.org> AuthorDate: 2023-11-01 16:06:50 +0000 Commit: Ben Kohler <bkohler@gentoo.org> CommitDate: 2023-11-01 16:24:04 +0000 dev-python/stapler: fix dependency spec for pypdf Closes: https://bugs.gentoo.org/916105 Signed-off-by: Ben Kohler <bkohler@gentoo.org> ...tapler-1.0.0_p20220330-PyPDF2-to-pypdf-r1.patch | 52 ++++++++++++++++++++++ .../stapler/stapler-1.0.0_p20220330-r4.ebuild | 39 ++++++++++++++++ 2 files changed, 91 insertions(+)