Hi, @Smilish,
I hope this below code will help you:
file_list = ['Sample1.csv', 'Sample2.csv']
| f1 = open(file_list[0], 'r').readlines()  f2 = open(file_list[1], 'r').readlines()  fName = open('output.csv', 'a') for _ in range(2):  for row in f1:  if row not in f2:  fName.write(row)  f1, f2 = f2, f1 |