openpyxl Value must be one of set(...
*Created originally on Bitbucket by [MauMau (Mauricio Júnior)](https://bitbucket.org/%7B4c1d1d42-0202-48b5-b171-0b91c8116e65%7D/)* The following bug: https://groups.google.com/forum/#!topic/python-excel/XUlhMnU4gvY It was solved for the version 2.3, but it seems to be missed on later versions. *Attachments:* [Book.xlsx](/uploads/00b59fc4c13ee40f8248a4eaca00de5e/Book.xlsx)
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