1_2.py

   1 all_of_them = []
   2 current = 0
   3
   4 with open("1_1.in") as fh:
   5     for line in fh:
   6         line = line.strip()
   7         if not line:
   8             all_of_them.append(current)
   9             current = 0
  10             continue
  11
  12         current += float(line)
  13
  14 all_of_them.sort(reverse=True)
  15 print(sum(all_of_them[:3]))