Group questions first part

aoc2020/day05/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=")
     ]

aoc2020/day06/solution.py

@@ -0,0 +1,26 @@
+import sys
+import typing
+
+
+def main() -> int:
+    counts_sum = sum([c for c in _iter_group_counts(sys.stdin)])
+    print(f"counts_sum={counts_sum}")
+
+    return 0
+
+
+def _iter_group_counts(instream: typing.TextIO) -> typing.Generator[int, None, None]:
+    cur_group = set()
+    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 len(cur_group)
+
+
+if __name__ == "__main__":
+    sys.exit(main())

aoc2020/day06/test-input

@@ -0,0 +1,15 @@
+abc
+
+a
+b
+c
+
+ab
+ac
+
+a
+a
+a
+a
+
+b

aoc2020/day06/test-output

@@ -0,0 +1 @@
+counts_sum=11

aoc2020/day06/test_solution.py

@@ -0,0 +1,23 @@
+import sys
+
+from pathlib import Path
+
+import pytest
+
+from solution import main
+
+
+HERE = Path(__file__).absolute().parent
+
+
+def test_solution(capsys):
+    with (HERE / "test-input").open() as infile:
+        sys.stdin = infile
+        main()
+
+    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")
+    ]