BUG: pivot/unstack leading to too many items should raise exception#23512

Merged

jreback merged 15 commits intopandas-dev:masterfrom

sweb:too_many_items_to_unstack

Dec 31, 2018

Commits on Nov 8, 2018

ENH GH20601 raise an error when the number of levels in a pivot table larger than int32

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TST add a test for pivot table large number of levels causing int32 overflow

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CLN PEP8 compliance

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ENH catch the int32 overflow error earlier and in two separate places: in pivot_table and unstack

anhqle
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CLN PEP8 compliance

anhqle
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ENH calculate size of the resulting pivot table and raise error if it's too big

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rebase onto upstream master

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ENH: Raise and catch FloatingPointException due to overflow
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Commits on Nov 12, 2018

ENH: use pd.compat for windows check, add comment
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Commits on Dec 3, 2018

Merge remote-tracking branch 'upstream/master' into too_many_items_to_unstack
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Commits on Dec 31, 2018

DOC: Added whatsnew entry (#23512)
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