Second part of group questions

aoc2020/day06/solution.py

@@ -10,16 +10,32 @@ def main() -> int:
 
 
 def _iter_group_counts(instream: typing.TextIO) -> typing.Generator[int, None, None]:
-    cur_group = set()
+    for i, group in enumerate(_iter_groups(instream)):
+        answers = set(list(group[0]))
+        print(f"i={i} initial={answers}")
+
+        for answers_text in group[1:]:
+            to_add = set(list(answers_text))
+            answers = answers.intersection(set(list(answers_text)))
+            print(f"i={i} added={to_add} result={answers}")
+
+        print(f"i={i} final={answers} n={len(answers)}")
+        yield len(answers)
+
+
+def _iter_groups(instream):
+    cur_group = []
+
     for line in instream:
         line = line.strip()
         if line == "":
-            yield len(cur_group)
-            cur_group = set()
-        for c in list(line):
-            cur_group.add(c)
+            yield cur_group
+            cur_group = []
+            continue
 
-    yield len(cur_group)
+        cur_group.append(line)
+
+    yield cur_group
 
 
 if __name__ == "__main__":

aoc2020/day06/test-output

@@ -1 +1 @@
-counts_sum=11
+counts_sum=6

aoc2020/day06/test_solution.py

@@ -17,7 +17,5 @@ def test_solution(capsys):
 
     expected_output = (HERE / "test-output").read_text().splitlines()
     assert expected_output == [
-        l
-        for l in capsys.readouterr().out.splitlines()
-        if not l.startswith("highest_seat")
+        l for l in capsys.readouterr().out.splitlines() if l.startswith("counts_sum")
     ]