matplotlib required but not listed as dependency

[astrojuanlu]

Description

matplotlib seems to be required by Kedro Viz, but is not listed as a dependency.

Context

I created a new environment and spaceflights Kedro project to do a test with Kedro Viz, only to discover that I also needed to install matplotlib. I don't recall this happening before.

Steps to Reproduce

$ micromamba create -n _testkedro310 python=3.10 -c conda-forge -y
$ micromamba activate _testkedro310
(_testkedro310) $ pip install kedro kedro-viz
(_testkedro310) $ kedro new --starter=spaceflights
(_testkedro310) $ cd test-kedro-viz
(_testkedro310) $ pip install -r src/requirements.txt
(_testkedro310) $ kedro viz

Expected Result

Kedro Viz launches normally.

Actual Result

Traceback (most recent call last):
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/bin/kedro", line 8, in <module>
    sys.exit(main())
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/kedro/framework/cli/cli.py", line 211, in main
    cli_collection()
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/kedro/framework/cli/cli.py", line 139, in main
    super().main(
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/kedro_viz/launchers/cli.py", line 86, in viz
    from kedro_viz.server import is_localhost, run_server
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/kedro_viz/server.py", line 18, in <module>
    from kedro_viz.integrations.kedro import data_loader as kedro_data_loader
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/kedro_viz/integrations/kedro/data_loader.py", line 132, in <module>
    if hasattr(matplotlib, "MatplotlibWriter"):
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/lazy_loader/__init__.py", line 77, in __getattr__
    submod = importlib.import_module(submod_path)
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/Users/juan_cano/.micromamba/envs/_testkedro310/lib/python3.10/site-packages/kedro_datasets/matplotlib/matplotlib_writer.py", line 11, in <module>
    import matplotlib.pyplot as plt
ModuleNotFoundError: No module named 'matplotlib'

Your Environment

Include as many relevant details as possible about the environment you experienced the bug in:

• Operating system and version: macOS Ventura
• Kedro version used (if relevant): 0.18.12
• Python version used (if relevant): 3.10.12

Checklist

• Include labels so that we can categorise your issue

[tynandebold]

I can confirm this. It happened to me too. The steps I ran:

conda create --name kedro-viz-matplotlib python=3.10 -y
conda activate kedro-viz-matplotlib
pip install kedro
pip install kedro-viz
kedro new --starter=spaceflights
cd kedro-viz-matplotlib
pip install -r src/requirements.txt
kedro viz

Is the solve to simply include matplotlib in the requirements file?

I'm confused though I don't remember us needing this in the past. Wondering where it came from.

[rashidakanchwala]

This will be resolved once 6.4.0 releases as Nok solved it in this PR - #1481