Openpyxl hangs up when opening a particular xlsx
*Created originally on Bitbucket by [simoscofield (C. W.)](https://bitbucket.org/%7B9a7670a9-7be2-4ece-b16b-7c5a68d5de43%7D/)* Here is the url for the file: [https://www.edd.ca.gov/Jobs\_and\_Training/warn/WARN\_Report.xlsx](https://www.edd.ca.gov/Jobs_and_Training/warn/WARN_Report.xlsx) ``` from openpyxl import load_workbook load_workbook('WARN_Report.xlsx') # hangs ``` This was initially reported by a pyexcel user on github \(reference: [https://github.com/pyexcel/pyexcel-xls/issues/34](https://github.com/pyexcel/pyexcel-xls/issues/34)\). After some diagnosis, it turns out openpyxl actually hangs up. I thought it may be of some interest for your project so I am opening an issue here.
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