in plotly-dash.How should I apply the FigureResampler if I use the px.line?

[sc303030]

In the current project, I'm drawing a graph using plotly-dash px.line.

from plotly_resampler import register_plotly_resampler
register_plotly_resampler(mode='auto')

he code above works fine.

I want to use FigureResampler, but there is only go.Figure in the example, so I used the same for the px.line.

fig =  FigureResampler(px.line(df[col_name], x="datetime", y=y_axes, color="target", render_mode="webg1"))

But the result I wanted didn't come out like register_plotly_resampler. Is there any way I can use it on px.line?

[jvdd]

Hi, I tested similar code to what you provided in your question and it worked as expected (the output of px.line which is a go.Figure was correctly transformed into a FigureResampler object).

Hence, in this response I'll answer two questions that in my belief are relevant for this discussion;

a) How does register_plotly_resampler(mode='auto') work?
=> I believe this is necessary to understand how & why your results were satisfactory.
b) How to use FigureResampler?
=> This answers the second & main part of your question.

A. How does register_plotly_resampler(mode='auto') work?

This function results in the use of plotly-resampler under the hood, meaning that plotly figures will be wrapped automatically by the plotly-resampler decorators.
The mode argument determines what decorator should be used. The 'auto' mode uses FigureWidgetResampler in IPython based environments (e.g., Jupyter notebooks) and FigureResampler in other environments (e.g., running .py file in the terminal).
More details in the documentation

So depending on the environment in which you were working, either FigureResampler or FigureWidgetResampler was used to decorate the plotly figures with (under the hood).

B. How to use FigureResampler?

You can apply FigureResampler in 2 ways;

1. using register_plotly_resampler with the mode argument set to 'figure'
2. decorate the figure with the FigureResampler class

Note however that for the FigureResampler you need to call .show_dash to display the visualization (or output the object in a cell via IPython.display)!
More details: https://github.com/predict-idlab/plotly-resampler#usage

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PS & TLDR: if you were working in a Jupyter notebook, I would suggest you to use FigureWidgetResampler instead of FigureResampler to obtain the same output as you had with register_plotly_resampler(mode='auto') .