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Explore dropping Pandas requirement for Plotly Express

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
45/100
Issue type
Refactor
Clarity
Mostly clear
Activity status
Active
Tech stack
pandas, python

Research direction

Start with the trendline-related code shown in the linked Plotly.py pull request 4790 diff, especially lines R114-R129. Check how rolling, expanding, and ewm currently depend on Pandas and track the corresponding Narwhals support. Done means Plotly.py trendline functions no longer require Pandas after the needed Narwhals release is available.

Written by the indexing model from the issue text.

Description

feature P2

In https://github.com/plotly/plotly.py/pull/4790, nearly all Pandas functionality is removed from Plotly.py, except some of our trendine functions.

Narwhals does not yet support rolling, expanding nor ewm, and until that support is added, we need to use Pandas to calculate trendlines.

Those functions are on the Narwhals roadmap, and we should have a quick follow-up in Plotly.py to implement those changes after the first set of Narwhals changes are made and the good folks at Narwhals release that update 🙂 .

See: https://github.com/plotly/plotly.py/pull/4790/files/6676061152527160b44dbf67ecf6b89e46eef3b2#diff-e667a84629ee8d2879cf22a88c8ff80bcfec1c35be69ab9f50be5938c7089ddaR114-R129

Dominant language
Python
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Forks
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Avg merge
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Merged PRs (30d)
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