Solve 2015:8 "Machinesticks"

2015-python/solutions/day_08.py

@@ -0,0 +1,31 @@
+import re
+from solutions import BaseSolution
+
+
+class Solution(BaseSolution):
+    input_file = "08.txt"
+
+    def __str__(self):
+        return "Day 8: Matchsticks"
+
+    def parse_input(self, data):
+        return data.split()
+
+    def solve(self, puzzle_input):
+        def lendiff(line):
+            readable = eval(line)
+            return len(line) - len(readable)
+
+        return sum(map(lendiff, puzzle_input))
+
+    def solve_again(self, puzzle_input):
+        def lendiff(line):
+            encoded = f'"{line.replace("\\", "\\\\").replace('"', '\\"')}"'
+            return len(encoded) - len(line)
+
+        return sum(map(lendiff, puzzle_input))
+
+
+if __name__ == "__main__":
+    solution = Solution()
+    solution.show_results()

2015-python/tests/test_day_08.py

@@ -0,0 +1,26 @@
+import unittest
+
+from solutions.day_08 import Solution
+
+
+class Day08TestCase(unittest.TestCase):
+    def setUp(self):
+        self.solution = Solution()
+        self.puzzle_input = self.solution.parse_input(
+            r"""
+""
+"abc"
+"aaa\"aaa"
+"\x27"
+            """
+        )
+
+    def test_solve_first_part(self):
+        assert self.solution.solve(self.puzzle_input) == 12
+
+    def test_solve_second_part(self):
+        assert self.solution.solve_again(self.puzzle_input) == 19
+
+
+if __name__ == "__main__":
+    unittest.main()