wb = open_workbook('tmp.xls', formatting_info=True)
sheet = wb.sheet_by_name('1')
cell = sheet.cell(6, 0)
print('cell.xf_index is', cell.xf_index)
fmt = wb.xf_list[cell.xf_index]
print('type(fmt) is', type(fmt))
print() 
print('fmt.dump():')
fmt.dump()
How to get Excel cell properties in Python