I am not quite sure how to use the following function:
xlrd.xldate_as_tuple
for the following data
xldate:39274.0 xldate:39
Here's what I use to automatically convert dates:
cell = sheet.cell(row, col) value = cell.value if cell.ctype == 3: # xldate value = datetime.datetime(*xlrd.xldate_as_tuple(value, workbook.datemode))