diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/difflib.py | 4 | ||||
| -rw-r--r-- | Lib/test/test_difflib.py | 9 |
2 files changed, 11 insertions, 2 deletions
diff --git a/Lib/difflib.py b/Lib/difflib.py index 38dfef4..7eb42a9 100644 --- a/Lib/difflib.py +++ b/Lib/difflib.py @@ -511,8 +511,8 @@ class SequenceMatcher: non_adjacent.append((i1, j1, k1)) non_adjacent.append( (la, lb, 0) ) - self.matching_blocks = non_adjacent - return map(Match._make, self.matching_blocks) + self.matching_blocks = list(map(Match._make, non_adjacent)) + return self.matching_blocks def get_opcodes(self): """Return list of 5-tuples describing how to turn a into b. diff --git a/Lib/test/test_difflib.py b/Lib/test/test_difflib.py index 325449a..0ba8f0e 100644 --- a/Lib/test/test_difflib.py +++ b/Lib/test/test_difflib.py @@ -76,6 +76,15 @@ class TestSFbugs(unittest.TestCase): diff_gen = difflib.unified_diff([], []) self.assertRaises(StopIteration, next, diff_gen) + def test_matching_blocks_cache(self): + # Issue #21635 + s = difflib.SequenceMatcher(None, "abxcd", "abcd") + first = s.get_matching_blocks() + second = s.get_matching_blocks() + self.assertEqual(second[0].size, 2) + self.assertEqual(second[1].size, 2) + self.assertEqual(second[2].size, 0) + def test_added_tab_hint(self): # Check fix for bug #1488943 diff = list(difflib.Differ().compare(["\tI am a buggy"],["\t\tI am a bug"])) |