fix: Pandas 3.0 warning for inplace method

[lars20070]

Related #637

Proposed Changes

Currently, the following warning for inplace methods in the upcoming Pandas 3.0 is triggered.

~/.venv/lib/python3.11/site-packages/influxdb_client/client/write/dataframe_serializer.py:237: FutureWarning: A value is trying to be set on a copy of a DataFrame or Series through chained assignment using an inplace method.
The behavior will change in pandas 3.0. This inplace method will never work because the intermediate object on which we are setting values always behaves as a copy.

For example, when doing 'df[col].method(value, inplace=True)', try using 'df.method({col: value}, inplace=True)' or df[col] = df[col].method(value) instead, to perform the operation inplace on the original object.

The pull request silences the warning.

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] pytest tests completes successfully
• [x] Commit messages are conventional
• [x] Sign CLA (if not already signed)

[lars20070]

Hi @bednar, Pandas is currently in version 2.2 with 3.0 scheduled for April 2024. No, I cannot explain why Pandas triggered the warning. But you might be on the safe side using option 2 and be prepared for the upcoming breaking changes. I can see your #638 changes but still get the warning from this line.

[lars20070]

@bednar I struggle a bit to understand your setup. I am more familiar with Poetry projects. I would appreciate your input.

• [x] I have updated the CHANGELOG.md.
• [ ] I forked yesterday. So no need to rebase. I see no merge conflicts.
• [ ] pytest seems to pass. I see no failing tests.

• [ ] Guess my commit message was not quite conventional.

  Can you please explain what changes in the code are needed. I cannot see any merge conflicts or failing tests. Thanks.

[bednar]

@lars20070, please sign the CLA and check the checkbox so we can proceed with merging your PR.

[lars20070]

Signed. Thanks @bednar.

[lars20070]

On a totally unrelated note. Any chance of looking into this issue? Apologies for cross-posting.

[bednar]

@lars20070 unfurnetally I don't know anything about vsflux... I am at JetBrains IDEs ;)