Day 3 (Puzzle 1) - Rucksack Reorganization

Successfully finished the first puzzle.

entities/elf.py

@@ -1,4 +1,4 @@
-from typing import Tuple
+from typing import Tuple, List
 
 from entities.items.item import Item
 from entities.items.food import Food
@@ -75,3 +75,14 @@ class Elf:
                 raise Exception(f"Something went terribly wrong! Other: {other} Own: {own}")
 
         return was_win, round_score + RPS.RPS_SHAPE_TO_SCORE[own]
+
+    def check_rucksack_for_compartment_duplicates(self, rucksack: Tuple[List[str], List[str]]) -> str:
+        """
+        Check a given rucksack for the duplicate item according to day 3 puzzle 1
+        :return: the duplicate item (as a character)
+        """
+        for a in rucksack[0]:
+            if a in rucksack[1]:
+                return a
+
+        raise ValueError(f"Couldn't find ANY duplicate in this rucksack: {rucksack[0]} | {rucksack[1]}")

input/day3/example_packs.lst

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input/day3/input.lst

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main.py

@@ -1,21 +1,17 @@
+from rucksack.file.rucksack_loader import RucksackLoader
+from rucksack.ItemPriorities import item_priority
 from entities.elf import Elf
-from rockpaperscissor.file.guide_list import RockPaperScissorGuide
+
 
 if __name__ == "__main__":
-    my_elf = Elf()
-    other_elf = Elf()
-    rounds = RockPaperScissorGuide("./input/day2/input.lst").parse_file()
-    scores = []
-    for other, own in rounds:
-        result, score = my_elf.evaluate_RPS_round(other, own)
-        scores.append(score)
-        if result:
-            r = "won"
-        else:
-            r = "lost"
-        print(f"Elf {my_elf} played {own} against {other} and {r} with {score} points!")
+    rs = RucksackLoader("./input/day3/input.lst").parse_file()
+    i = item_priority
+    duplicate_prios = []
+    for rucksack in rs:
+        elf = Elf()
+        duplicate = elf.check_rucksack_for_compartment_duplicates(rucksack)
+        duplicate_prios.append(item_priority[duplicate])
+        print(f"{elf} found duplicate \"{duplicate}\" with priority {item_priority[duplicate]}!")
 
     print()
-    print(f"I've got a total of {sum(scores)} points!")
-
-
+    print(f"The priority sum is {sum(duplicate_prios)}")

main_day2.py

@@ -0,0 +1,21 @@
+from entities.elf import Elf
+from rockpaperscissor.file.guide_list import RockPaperScissorGuide
+
+if __name__ == "__main__":
+    my_elf = Elf()
+    other_elf = Elf()
+    rounds = RockPaperScissorGuide("./input/day2/input.lst").parse_file()
+    scores = []
+    for other, own in rounds:
+        result, score = my_elf.evaluate_RPS_round(other, own)
+        scores.append(score)
+        if result:
+            r = "won"
+        else:
+            r = "lost"
+        print(f"Elf {my_elf} played {own} against {other} and {r} with {score} points!")
+
+    print()
+    print(f"I've got a total of {sum(scores)} points!")
+
+

rucksack/ItemPriorities.py

@@ -0,0 +1,3 @@
+alphabet = "abcdefghijklmnopqrstuvwxyz"
+
+item_priority = dict(zip(alphabet+alphabet.upper(), range(1, len(alphabet)+27+1)))

rucksack/file/rucksack_loader.py

@@ -0,0 +1,21 @@
+from typing import List, Tuple
+
+
+class RucksackLoader:
+
+    def __init__(self, path: str):
+        self.path = path
+
+    def parse_file(self) -> List[Tuple[List[str], List[str]]]:
+        rucksacks = []
+        with open(self.path, "r") as file:
+            for line in file:
+                line = line.strip()
+                if len(line) == 0:
+                    continue
+                comp_1 = list(line[:len(line)//2])
+                comp_2 = list(line[len(line)//2:])
+                rucksacks.append((comp_1, comp_2))
+
+        return rucksacks
+