plotly / plotly/plotly.py

Line width = 0 in templates effectively disables hline and vline

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bug P3
Dominant language
Python
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Description

Three of the templates, ggplot2, simple_white and seaborn have line width set to 0.
https://github.com/plotly/plotly.py/blob/743b52484f47c518b85a04027c1b393528f44c15/packages/python/plotly/templategen/definitions.py#L44
https://github.com/plotly/plotly.py/blob/743b52484f47c518b85a04027c1b393528f44c15/packages/python/plotly/templategen/definitions.py#L95
https://github.com/plotly/plotly.py/blob/743b52484f47c518b85a04027c1b393528f44c15/packages/python/plotly/templategen/definitions.py#L223

This causes the add_hline and add_vline methods to not appear by default when using these templates, and the line_width property has to be set manually. I'm proposing that these templates have a thin line width value to enable vlines and hlines by default.

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Research direction

Start in packages/python/plotly/templategen/definitions.py at the referenced lines for the ggplot2, simple_white, and seaborn templates. Check how their zero line widths affect add_hline and add_vline, then verify that a thin default line enables both methods without requiring line_width to be set manually.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
data-visualization
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
45/100

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