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jreback merged 4 commits into from
Sep 17, 2019
Merged

BUG: Raise when casting infinity to int #28475

jreback merged 4 commits into from
Sep 17, 2019

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@dsaxton
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@dsaxton dsaxton commented Sep 17, 2019 •
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  • tests added / passed
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Raises a ValueError when attempting to cast a Float64Index with infinite values to a (non-ExtensionArray) integer dtype. Currently this returns a garbage value:

idx                                                               
# Float64Index([1.0, 2.0, inf], dtype='float64')
idx.astype(int)                                                   
# Int64Index([1, 2, -9223372036854775808], dtype='int64')

Related PR: #28438

@WillAyd WillAyd added the Error Reporting Incorrect or improved errors from pandas label Sep 17, 2019
@WillAyd WillAyd added this to the 1.0 milestone Sep 17, 2019
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WillAyd commented Sep 17, 2019

Haven't followed entire discussion but high level lgtm - thanks for the PR! I think @TomAugspurger can have ultimately say here though

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TomAugspurger reviewed Sep 17, 2019
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Need to agree that this is a bugfix and not an API change. I think we're safe calling it a bug.

pandas/core/indexes/numeric.py Outdated
# TODO(jreback); this can change once we have an EA Index type
# GH 13149
raise ValueError("Cannot convert NA to integer")
if self.hasnans:
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Can this re-use astype_nansafe? That should handle things, including the nullable-integer check.

jreback
jreback requested changes Sep 17, 2019
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@jreback jreback merged commit 367670e into pandas-dev:master Sep 17, 2019
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jreback commented Sep 17, 2019

thanks @dsaxton

@dsaxton dsaxton deleted the inf-float branch September 19, 2019 13:40
proost pushed a commit to proost/pandas that referenced this pull request Dec 19, 2019
@dsaxton @proost
BUG: Raise when casting infinity to int (pandas-dev#28475)
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proost pushed a commit to proost/pandas that referenced this pull request Dec 19, 2019
@dsaxton @proost
BUG: Raise when casting infinity to int (pandas-dev#28475)
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@jreback jreback jreback approved these changes

@TomAugspurger TomAugspurger TomAugspurger approved these changes

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