Solve day 3 with python

2015/days/03/walk.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+count = 0
+x = 0
+y = 0
+visited = {}
+
+MOTION = {
+    "^": [0, -1],
+    "<": [-1, 0],
+    "v": [0, 1],
+    ">": [1, 0]
+}
+
+def move(char):
+    global x
+    global y
+    motion = MOTION[char]
+    x += motion[0]
+    y += motion[1]
+    visit(x, y)
+
+def visit(x, y):
+    global count
+    if (x, y) not in visited:
+        visited[(x, y)] = 1
+        count += 1
+
+visit(x, y)
+with open("./data/input", "r") as f:
+    for line in f:
+        for char in line:
+            move(char)
+print(count)