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man-group / arctic

High performance datastore for time series and tick data
https://arctic.readthedocs.io/en/latest/
GNU Lesser General Public License v2.1
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fix: Handle index timezones of dateutil.timezone.tzutc() #1013

Closed lwfitzgerald closed 8 months ago

lwfitzgerald commented 8 months ago

Due to an earlier change in this area, a regression was introduced where dateutil.timezone.tzutc() was serialized as the string "tzutc()". pandas is unable to create a timezone from this, so data could not be reconstructed.

This change restores the old behaviour where dateutil.timezone.tzutc() is serialized as the string "UTC".

Another prior fix to consistently serialize dateutil.timezone.gettz("UTC") for multi-level indexes is also extended in this change to cover single level indexes.