STINNER Victor added the comment: > It comes from the real environment.
Oh. It looks possible to define an environment variable with an empty key, but not to remove it: $ env -i =value python -c 'import pprint, os; pprint.pprint(os.environ); del os.environ[""]' environ({'': 'value'}) Traceback (most recent call last): File "<string>", line 1, in <module> File "Lib/os.py", line 662, in __delitem__ self.unsetenv(encodedkey) OSError: [Errno 22] Invalid argument ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue20658> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com