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update docstring and eval with overrides #6241

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wyli
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@wyli wyli commented Mar 27, 2023

  • docstring updates
  • Compose execute with start=None

Types of changes

  • Non-breaking change (fix or new feature that would not break existing functionality).
  • Breaking change (fix or new feature that would cause existing functionality to change).
  • New tests added to cover the changes.
  • Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
  • Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
  • In-line docstrings updated.
  • Documentation updated, tested make html command in the docs/ folder.

@wyli wyli requested a review from atbenmurray March 27, 2023 11:58
@wyli wyli mentioned this pull request Mar 27, 2023
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@wyli wyli force-pushed the resolves-lazy-eval branch from e518132 to 304eb05 Compare March 27, 2023 12:05
Signed-off-by: Wenqi Li <[email protected]>
@ericspod
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@atbenmurray is planning on making some changes to a number of aspects this PR touches so perhaps we wait on this one a bit.

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Still need a pause on this one for the moment

@@ -345,8 +345,7 @@ def _post_transform(self, item_transformed):
first_random = self.transform.get_index_of_first(
lambda t: isinstance(t, RandomizableTrait) or not isinstance(t, Transform)
)
if first_random is not None:
item_transformed = self.transform(item_transformed, start=first_random)
item_transformed = self.transform(item_transformed, start=first_random)
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execute shouldn't have to handle start is None I think

"""
end_ = len(transforms) if end is None else end
if start is None:
raise ValueError(f"'start' ({start}) cannot be None")
input_ = evaluate_with_overrides(
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I am not sure this is the correct way to handle this issue. I know you are trying to isolate dataset from changes, but I don't understand why evaluate_with_overrides needs to be called

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In any case, please hold off on this for now until I have assembled the PR that refactors some of this code for simplicity.

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@wyli wyli Mar 28, 2023

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mainly to replicate this line on the dev branch:

item_transformed = self.transform.evaluate_with_overrides(item_transformed, None)

so that the final transform always gets the pending operations evaluated

#6224 (comment)

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If first_random is None, that means your entire compose was run before the item was cached, which would include the final evaluation. When the item is loaded from the cache, it has no pending transforms, so you have no way for pending transforms to be added that would then need to be evaluated

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As per the review on #6244, if we agree that we aren't supporting caching of pending transforms, we can close this PR without a merge.

@wyli wyli closed this Mar 28, 2023
@wyli wyli deleted the resolves-lazy-eval branch March 28, 2023 15:10
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3 participants