I am using the function open_workbook() to open an excel file. But I cannot find any function to close the file later in the xlrd module. Is there a way to close the xls file using xlrd? Or is not required at all?
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Digging into the mailing list archive, it seems that the file object is closed directly by the constructor, so you don't need to close it explicitly.

Andrea Spadaccini
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6Note if you use on_demand=True the file is _not_ closed, even if the workbook is collected. This is documented in the xlrd comments. You should be careful to call release_resources() before letting the workbook go away. – Paul Du Bois Nov 23 '11 at 03:50
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The open_workbook calls the release_resources ( which closes the mmaped file ) before returning.

Tripy
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