Co-realise #2966
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Co-realise #2966
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Could not review pull request. It may be too large, or contain no reviewable changes. |
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@pp-mo - I'm somewhat concerned about this one. What happened with it? It says "merged", but there are 0 commits. It also says "Do not merge", yet it looks like it might have been merged. Any clues? 😄 |
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Not entirely sure of details, but I suspect that #2967 included the original commit for this, so it became redundant when that was merged. |
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PLEASE COMMENT, BUT DO NOT MERGE
because, apart from discussion, a test is still needed ...
Purpose:
User code often forms multiple stats, where data may be very large.
= several small, lazy, calculated results derived from same large, lazy data
Calculation scans the data, each time you realise one.
This can + should be done in parallel with
da.compute(*dask_stats_arrays).We need to assign back into Iris cube.data elements.
I can't find a neat Python idiom for this, so we can provide a simple utility routine.
Note: I'm proposing to put this in package
irisitself, as I don't rate the alternatives :iris._lazy_datais privateiris.utils, on inspection, I think is for "handy things you might just have written yourself"whereas : this code uses knowledge of internals.