Martin Panter added the comment: I wonder if this has anything to do with _strptime._TimeRE_cache. This seems to get initialized when _strptime is first imported. Some of the tests in datetimetester temporarily set the timezone to -0500 EST, and another to UTC, but they change it back afterwards. So I cannot see how it could have an effect, but I don’t have a better theory.
>>> import _strptime # Regular expression cache is initialized >>> _strptime._TimeRE_cache["Z"] # I don't have a time zone set '(?P<Z>gmt|utc)' >>> import os, time >>> os.environ["TZ"] = 'EST+05EDT,M3.2.0,M11.1.0' >>> time.tzset() >>> time.tzname ('EST', 'EDT') >>> from datetime import datetime >>> datetime.strptime("-0500 EST", "%z %Z") # Using original cache Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/proj/python/cpython/Lib/_strptime.py", line 555, in _strptime_datetime tt, fraction = _strptime(data_string, format) File "/home/proj/python/cpython/Lib/_strptime.py", line 356, in _strptime (data_string, format)) ValueError: time data '-0500 EST' does not match format '%z %Z' ---------- components: +Tests nosy: +martin.panter type: -> behavior _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue25168> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com