Dependency issue: ModuleNotFoundError: No module named 'pytz' with pandas >= 3.0.0

[wy-z]

Acknowledgement

First of all, I would like to thank the team for the excellent work on ArcticDB. It is a fantastic tool and I appreciate the effort put into maintaining it.

Description

I am writing to report an issue regarding dependency management when using newer versions of pandas. I encountered a ModuleNotFoundError: No module named 'pytz' when setting up ArcticDB in an environment with pandas 3.0.0+.

Root Cause

Pandas has recently changed pytz from a required dependency to an optional dependency in version 3.0.0.
Previously, ArcticDB likely relied on pandas to transitively install pytz. With this change, if a user installs a fresh environment with pandas >= 3.0.0 (and does not explicitly install pytz), ArcticDB fails to import.

Reference:
[Pandas 3.0.0 Whatsnew - pytz now an optional dependency](https://github.com/pandas-dev/pandas/blob/1797ba54796ec1dc726cb6dd5039c238caec30a2/doc/source/whatsnew/v3.0.0.rst#pytz-now-an-optional-dependency)

Steps to Reproduce

1. Create a clean Python environment.
2. Install pandas>=3.0.0 (ensure pytz is not manually installed).
3. Install arcticdb.
4. Attempt to import or use arcticdb.

Observed Error

ModuleNotFoundError: No module named 'pytz'

Suggested Fix

Since ArcticDB appears to rely on pytz directly, it should be added explicitly to the install_requires list (or pyproject.toml) in ArcticDB's configuration. This will ensure it is always installed regardless of the pandas version used.

[phoebusm]

Hi @wy-z thanks for the ticket!
We have added pytz to the requirement of the wheels. The change should be included in the coming v6.9.0 release.
We are still working on pandas>=3 support. We'll update as soon as it has been made available.