python turtle gcode viewer

turtlegcode.py

import turtle

turtle.penup()

gcode = open("gcode.test", "r")

for line in gcode:
    command = { i[0] : int(i[1:]) for i in line.split() }
    if "M" in command:
        if command["M"] == 5:
            turtle.penup()
        elif command["M"] == 3:
            turtle.pendown()
            turtle.pencolor(command["S"], command["S"], command["S"])
    if "G" in command:
        if command["G"] == 0 or command["G"] == 1:
            turtle.moveto(command.get("X", turtle.pos()[0]), command.get("X", turtle.pos()[1]))

print("Done");

input();