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File "/usr/local/lib/python3.9/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 972, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 850, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "/usr/local/lib/python3.9/site-packages/setuptools/__init__.py", line 18, in
from setuptools.dist import Distribution
File "/usr/local/lib/python3.9/site-packages/setuptools/dist.py", line 34, in
from ._importlib import metadata
File "/usr/local/lib/python3.9/site-packages/setuptools/_importlib.py", line 39, in
disable_importlib_metadata_finder(metadata)
File "/usr/local/lib/python3.9/site-packages/setuptools/_importlib.py", line 28, in disable_importlib_metadata_finder
to_remove = [
File "/usr/local/lib/python3.9/site-packages/setuptools/_importlib.py", line 31, in
if isinstance(ob, importlib_metadata.MetadataPathFinder)
AttributeError: module 'importlib_metadata' has no attribute 'MetadataPathFinder'
ERROR Backend subprocess exited when trying to invoke get_requires_for_build_wheel
*** Error code 1
この現象は、時々起きるらしく、外国のメンテナンス作業者の解決策として、どうやら# cd /usr/local/lib # rm -rf python3.*としてから、
# portupgrade -rf python.3.9.18(インストールされている Python バージョンに合わせる)

