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BUG: DataFrame.iloc.setitem with IntegerArray values #38952

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jbrockmendel opened this issue Jan 4, 2021 · 0 comments · Fixed by #39040
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BUG: DataFrame.iloc.setitem with IntegerArray values #38952

jbrockmendel opened this issue Jan 4, 2021 · 0 comments · Fixed by #39040
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Bug ExtensionArray Extending pandas with custom dtypes or arrays. Indexing Related to indexing on series/frames, not to indexes themselves Needs Triage Issue that has not been reviewed by a pandas team member
Milestone
1.3

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@jbrockmendel
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arr = pd.array([4, 5, 6])
df = pd.DataFrame(np.arange(3))

>>> df.iloc[:2] = arr[:2]
ValueError: could not broadcast input array from shape (2) into shape (2,1)

>>> df.iloc[:2] = arr[:2].to_numpy()  # <-- works fine

This bug would not occur with 2D EAs.
@jbrockmendel jbrockmendel added Bug Needs Triage Issue that has not been reviewed by a pandas team member labels Jan 4, 2021
@jbrockmendel jbrockmendel mentioned this issue Jan 8, 2021
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@jreback jreback added this to the 1.3 milestone Jan 8, 2021
@jreback jreback added ExtensionArray Extending pandas with custom dtypes or arrays. Indexing Related to indexing on series/frames, not to indexes themselves labels Jan 9, 2021
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Bug ExtensionArray Extending pandas with custom dtypes or arrays. Indexing Related to indexing on series/frames, not to indexes themselves Needs Triage Issue that has not been reviewed by a pandas team member
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BUG: DataFrame.iloc.__setitem__ with IntegerArray values jbrockmendel/pandas
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