Make imports of heavy packages lazy #491
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jonmmease
commented
May 9, 2024
| @@ -82,6 +81,3 @@ def spec_to_mime_bundle( | |||
| return {"image/png": png} | |||
| else: | |||
| raise ValueError(f"Unsupported mimetype: {mimetype}") | |||
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| alt.renderers.register('vegafusion-mime', vegafusion_mime_renderer) | |||
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Now registered using an entry point to avoid the need to import altair
jonmmease
commented
May 9, 2024
| return None | ||
| group = child_group | ||
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| return group |
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Moved out from evaluation.py since it's not used there any more
jonmmease
commented
May 9, 2024
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| alt.data_transformers.register("vegafusion-feather", feather_transformer) | ||
| alt.data_transformers.register("vegafusion-inline", inline_data_transformer) |
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Moved to entry point for registration so as to not import altair for register
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Improve VegaFusion import time by making the imports of the following packages lazy:
pyarrowpolarspandasduckdbaltairPreviously these would all be imported eagerly if they are installed, which could lead to multi-second import time if VegaFusion is used in an environment where they are all installed.
To make it easier to make
altairlazy, I updated thetransformed_datafunction to delegate to the Altair implementation.