[ARROW-9993] [Python] Tzinfo - string roundtrip fails on pytz.StaticTzInfo objects

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Python
• External issue URL: https://github.com/apache/arrow/issues/26018
• Assignee: Krisztian Szucs
• Reporter: Krisztian Szucs
• Created: 14/Sep/20 15:08
• Updated: 11/Jan/23 08:10
• Resolved: 28/Sep/20 09:24

Description

Timezone roundtrip fails with pytz.StaticTzInfo objects on master:

tz = pytz.timezone('Etc/GMT+1')
pa.lib.string_to_tzinfo(pa.lib.tzinfo_to_string(tz))

---------------------------------------------------------------------------
UnknownTimeZoneError                      Traceback (most recent call last)
<ipython-input-4-b890180b2fad> in <module>
----> 1 pa.lib.string_to_tzinfo(pa.lib.tzinfo_to_string(tz))

~/Workspace/arrow/python/pyarrow/types.pxi in pyarrow.lib.string_to_tzinfo()
   1838         Time zone object
   1839     """
-> 1840     cdef PyObject* tz = GetResultValue(StringToTzinfo(name.encode('utf-8')))
   1841     return PyObject_to_object(tz)
   1842

~/Workspace/arrow/python/pyarrow/error.pxi in pyarrow.lib.pyarrow_internal_check_status()
    120 cdef api int pyarrow_internal_check_status(const CStatus& status) \
    121         nogil except -1:
--> 122     return check_status(status)

~/.conda/envs/arrow38/lib/python3.8/site-packages/pytz/__init__.py in timezone(zone)
    179                 fp.close()
    180         else:
--> 181             raise UnknownTimeZoneError(zone)
    182
    183     return _tzinfo_cache[zone]

UnknownTimeZoneError: '-01'

Issue Links

• is fixed by: ARROW-9992 [C++][Python] Refactor python to arrow conversions based on a reusable conversion API