AoC 2020: day6

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

.gitignore

@@ -11,6 +11,10 @@
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
 
+# Python cache directory
+__pycache__
+.pytest_cache
+
 #VSCode
 .vscode
 .vscode/*

2020-python/solutions/day_6.py

@@ -0,0 +1,70 @@
+"""AOC Day 6"""
+
+import pathlib
+import time
+import collections
+
+TEST_INPUT = """abc
+
+a
+b
+c
+
+ab
+ac
+
+a
+a
+a
+a
+
+b"""
+
+def read_input(input_path: str) -> str:
+    """take input file path and return a str with the file's content"""
+    with open(input_path, 'r') as input_file:
+        input_data = input_file.read()
+        return input_data
+
+def extract(input_data: str) -> list:
+    """take input data and return the appropriate data structure"""
+    groups = input_data.strip().split("\n\n")
+    yes_count = list()
+    for group in groups:
+        persons = group.split("\n")
+        yes_count.append((len(persons), collections.Counter(''.join(persons))))
+    return yes_count
+
+def part1(entries: list) -> int:
+    """part1 solver take a list of sets and return an int"""
+    return sum(len(group[1].keys()) for group in entries)
+
+
+def part2(entries: list) -> int:
+    """part2 solver take a list of sets and return an int"""
+    count = 0
+    for group in entries:
+        for key in group[1].keys():
+            if group[1][key] == group[0]:
+                count += 1
+    return count
+
+def test():
+    """pytest testing function"""
+    entries = extract(TEST_INPUT)
+    assert part1(entries) == 11
+    assert part2(entries) == 6
+
+def main():
+    """main function"""
+    input_path = str(pathlib.Path(__file__).resolve().parent.parent) + "/inputs/" + str(pathlib.Path(__file__).stem)
+    start_time = time.time()
+    input_data = read_input(input_path)
+    entries = extract(input_data)
+    print("Part 1: %d" % part1(entries))
+    print("Part 2: %d" % part2(entries))
+    end_time = time.time()
+    print("Execution time: %f" % (end_time-start_time))
+
+if __name__ == "__main__":
+    main()