Advent Of Code Day 3 Part 1

import matplotlib.pyplot as plt


def move(l, coord, instruction):
    if len(instruction) == 0:
        return l
    movement = instruction[0]
    if movement[0] == 'U':
        l.append((coord[0], coord[1] + int(movement[1:])))
        return move(l, (coord[0], coord[1] + int(movement[1:])), instruction[1:])
    elif movement[0] == 'D':
        l.append((coord[0], coord[1] - int(movement[1:])))
        return move(l, (coord[0], coord[1] - int(movement[1:])), instruction[1:])
    elif movement[0] == 'R':
        l.append((coord[0] + int(movement[1:]), coord[1]))
        return move(l, (coord[0] + int(movement[1:]), coord[1]), instruction[1:])
    elif movement[0] == 'L':
        l.append((coord[0] - int(movement[1:]), coord[1]))
        return move(l, (coord[0] - int(movement[1:]), coord[1]), instruction[1:])


f = open('input.txt', 'r')
instructions1, instructions2 = f.readlines()
f.close()
instructions1 = instructions1.split(',')
instructions2 = instructions2.split(',')

# test case 1
# instructions1 = ['R75', 'D30', 'R83', 'U83', 'L12', 'D49', 'R71', 'U7', 'L72']
# instructions2 = ['U62', 'R66', 'U55', 'R34', 'D71', 'R55', 'D58', 'R83']

# test case 2
# instructions1 = ['R98', 'U47', 'R26', 'D63', 'R33', 'U87', 'L62', 'D20', 'R33', 'U53', 'R51']
# instructions2 = ['U98', 'R91', 'D20', 'R16', 'D67', 'R40', 'U7', 'R15', 'U6', 'R7']

coords1 = move([(0, 0)], (0, 0), instructions1)
coords2 = move([(0, 0)], (0, 0), instructions2)

plt.scatter(*zip(*coords1))
plt.scatter(*zip(*coords2))
plt.plot(*zip(*coords1), 'r-')
plt.plot(*zip(*coords2), 'b-')
plt.show()