python - xlwt: write multiple columns -

i have file containing data below

a,b,c,d e,f,g,h i,j,k,l 

i trying write excel file in 4 columns using xlwt in python. want in excel need create multiple sheets in same file. there lot of examples on how write 2 columns looping, couldn't find example of writing multiple columns. can body tell me how done ?

the following should looking for:

import xlwt  data1 = [["a1", "b1", "c1", "d1"], ["e1", "f1", "g1", "h1"], ["i1", "j1", "k1", "l1"]] data2 = [["a2", "b2", "c2", "d2"], ["e2", "f2", "g2", "h2"], ["i2", "j2", "k2", "l2"]] data3 = [["a3", "b3", "c3", "d3"], ["e3", "f3", "g3", "h3"], ["i3", "j3", "k3", "l3"]]  sheets = ["sheet 1", "sheet 2", "sheet 3"]  wb = xlwt.workbook()  sheet, data in zip(sheets, [data1, data2, data3]):     ws = wb.add_sheet(sheet)      row, row_value in enumerate(data):         col, col_value in enumerate(row_value):             ws.write(row, col, col_value)  wb.save('output.xls') 

this give excel file looking like: