2. METplotpy Release Information

When applicable, release notes are followed by the GitHub issue number which describes the bugfix, enhancement, or new feature: METplotpy GitHub issues.

2.1. METplotpy Version 4.0.0-beta1 release notes (20260205)

New Plots

None

Enhancements

  • None

Bugfixes

  • Use the METviewer data output directory when the points path is not defined in the yaml config file created by METviewer (#552)

  • WindRose plot shows incorrect legend when max wind speed is less than requested (#547)

Documentation

  • None

Repository, build, and test

  • None

2.2. METplotpy Upgrade Instructions

This section summarizes and highlights important changes to METplotpy since version 3.1.0, including:

Note

In the METplotpy-3.1.0-beta2 release, METplotpy switched from development with Python 3.10.4 to development with Python 3.12. View the requirements.txt/nco_requirements.txt file at the top level of the repository for version numbers for the corresponding third-party packages.

Note

In June 2025, Plotly made significant updates to the kaleido package with the 1.0.0 release by removing Google Chrome code. Now, users will need to have Google Chrome installed in directories specified in this Plotly documentation (based on operating system): https://plotly.com/python/static-image-export/

The METplotpy code downloads Chrome at runtime by invoking the kaleido.get_chrome_sync() method call.

If users do not wish to have Chrome downloaded at run time and already have Chrome installed in one of the expected locations (specified in the Plotly link above), then the PRE_LOAD_CHROME environment variable will need to be set to ‘True’ (case insensitive string).

Refer to the Kaleido README for more information on the changes: https://github.com/plotly/Kaleido