2_1.py

   1 """Calculate the final position of the submarine"""
   2
   3 horizonal = 0
   4 depth = 0
   5 with open("2_1_input.txt") as f:
   6     for line in f:
   7         command, distance = line.split(" ")
   8         distance = int(distance)
   9
  10         if command == "down":
  11             depth += distance
  12         elif command == "up":
  13             depth -= distance
  14         elif command == "forward":
  15             horizonal += distance
  16         else:
  17             raise RuntimeError("you fucked it captain")
  18
  19 print(horizonal, depth, horizonal * depth)