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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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NameError: name 'Panel' is not defined #904

Closed AwesomeRck3 closed 3 years ago

AwesomeRck3 commented 3 years ago

Arctic Version

arctic                    1.80.0

Arctic Store

Version Store

Platform and version

Python 3.8 Pandas 1.2.1

Description of problem and/or code sample that reproduces the issue

Hi All,

Looking for some guidance here. Was using Arctic Version Store to store dataframes. Recently updated my system and now getting errors when I try to write to library.

First message is: "Pandas dataframe contains Objects, saving as Blob"

with the final error message being: "NameError: name 'Panel' is not defined"

dbrakenhoff commented 3 years ago

There are quite some posts on this issue See #903 or #887 or #884 . The easiest solution for now is to downgrade pandas to e.g. 1.0.3 until the PRs that address this issue are accepted.

As for your first message, I think that happens when the dtype of a column or dataframe is object, in which case the data is stored as a blob (which is much slower).

AwesomeRck3 commented 3 years ago

Apologies, I see now. Resolved by reverting to 1.0.3. Many thanks.