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[ENH] t-SNE: Load openTSNE lazily #3883

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merged 1 commit into from
Jun 14, 2019

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pavlin-policar
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Description of changes

Fixes #3523.

Load openTSNE (and, in turn, numba) as a lazy module.

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  • Code changes
  • Tests
  • Documentation

@pavlin-policar
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@markotoplak please check.

@markotoplak
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@pavlin-policar, works well. I am back to 1 second. Thanks!

import openTSNE
import openTSNE.affinity
import openTSNE.initialization
if "openTSNE" in sys.modules:
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@pavlin-policar, I'm trying to revive this, but since the change caused a crash on travis in bioinformatics, it is difficult to debug.

Lookin for a cause, I found this condition very strange. When you import a module, it always appears in sys.modules, doesn't it? Why did you need this line, what did it try to prevent, what was the case when the condition was false?

Have you by any chance tried adding global openTSNE to the function?

Is it possible that bioinformatics tried to do something in parallel and this function was executed in parallel (though I don't see how this could have happened), and numba initialized twice? Qt, for instance, does (or used to) crash if you initialized QApplication twice.

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Orange.projection loads slowly after introduction of fastTSNE
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