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FIX: let pandas IndexInt64 work for boxplot#13398

Merged
NelleV merged 3 commits into
matplotlib:masterfrom
jklymak:fix-boxplot-pandas
Feb 19, 2019
Merged

FIX: let pandas IndexInt64 work for boxplot#13398
NelleV merged 3 commits into
matplotlib:masterfrom
jklymak:fix-boxplot-pandas

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@jklymak

@jklymak jklymak commented Feb 10, 2019

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PR Summary

Closes #10022 by casting the list of positions to an array as suggested by @tacaswell

PR Checklist

  • Has Pytest style unit tests
  • Code is Flake 8 compliant
  • New features are documented, with examples if plot related
  • Documentation is sphinx and numpydoc compliant
  • Added an entry to doc/users/next_whats_new/ if major new feature (follow instructions in README.rst there)
  • Documented in doc/api/api_changes.rst if API changed in a backward-incompatible way

@jklymak

jklymak commented Feb 10, 2019

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I think this fix is "OK" as a stopgap, but I think what really should happen is position be put through unit conversion (which I don't think it is). But I'll leave that for someone who actually uses boxplot to make sure it is done properly... Still think this should go in to make array-like things w/o units work OK. Happy to be told that someone's favourite units used to work, but break w/ this change.

positions = list(range(1, N + 1))
elif len(positions) != N:
raise ValueError(datashape_message.format("positions"))
positions = np.array(positions)

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This is a good fix for the case described in the ticket, but I think the code will continue raising obscure error when positions are not numbers. Can you add a check after this line about the dtype of the array being a number? Maybe something like:

if not isinstance(positions.dtype, numbers.Number):
     raise TypeError("positions should be a iterable of dtype number, but found dtype %s" % blah blah blah.)

When we end up supporting something else than numbers, this can be updated.

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I couldn't quite get that check to work; I had to check the first element. But if there is a better way, let me know.

@NelleV NelleV merged commit 2884058 into matplotlib:master Feb 19, 2019
@NelleV

NelleV commented Feb 19, 2019

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Thanks!

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boxplot: positions used to take Int64Index

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