Thanks for the reply.
Funny thing, grep revealed a small inconsistency in this error message:
Python/pythonrun.c:415: * XXX Exception exceptions.ImportError: 'No module named sha'
Python/import.c:1821: "No module named %.200s", name);
Python/import.c:2722: "No module named %.200s", name);
Lib/test/test_multiprocessing.py:27:# message: "No module named _multiprocessing". _multiprocessing is not compiled
Lib/test/test_concurrent_futures.py:8:# message: "No module named _multiprocessing". _multiprocessing is not compiled
Lib/test/test_pydoc.py:194:badimport_pattern = "problem in %s - ImportError: No module named %s"
Lib/runpy.py:104: raise ImportError("No module named %s" % mod_name)
Lib/xml/etree/ElementTree.py:1492: "No module named expat; use SimpleXMLTreeBuilder instead"
Lib/modulefinder.py:189: self.msgout(4, "raise ImportError: No module named", qname)
Lib/modulefinder.py:190: raise ImportError("No module named " + qname)
Lib/modulefinder.py:202: self.msgout(4, "raise ImportError: No module named", mname)
Lib/modulefinder.py:203: raise ImportError("No module named " + mname)
Lib/modulefinder.py:219: raise ImportError("No module named " + subname)
Lib/importlib/_bootstrap.py:811: raise ImportError("no module named {}; "
Lib/importlib/_bootstrap.py:820: raise ImportError("No module named {0}".format(name))
Lib/unittest/test/test_loader.py:242: self.assertEqual(str(e), "No module named sdasfasfasdf")
Lib/unittest/test/test_loader.py:622: self.assertEqual(str(e), "No module named sdasfasfasdf")
Fixing the Python modules is easy, but I don’t know how to change PyErr_Format (or how to write C, for that matter :) Do you make offers like Alexandre, who has proposed to write the C part if someone provides a diff for the Python version?