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authorBrett Cannon <bcannon@gmail.com>2004-07-10 23:54:07 (GMT)
committerBrett Cannon <bcannon@gmail.com>2004-07-10 23:54:07 (GMT)
commitd2c5b4b549b24e637b16c60bdfae7292e1e75c06 (patch)
tree08241f92b66f1610de16aba177e163a95480d19a /Lib/difflib.py
parentb8e1717041e21d2cc4a5d18fe2e948dc475f0d6e (diff)
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SequenceMatcher(None, [], []).get_grouped_opcodes() now returns a generator
that behaves as if both lists has an empty string in each of them. Closes bug #979794 (and duplicate bug #980117).
Diffstat (limited to 'Lib/difflib.py')
-rw-r--r--Lib/difflib.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/Lib/difflib.py b/Lib/difflib.py
index 529c786..e82c703 100644
--- a/Lib/difflib.py
+++ b/Lib/difflib.py
@@ -572,6 +572,8 @@ class SequenceMatcher:
"""
codes = self.get_opcodes()
+ if not codes:
+ codes = [("equal", 0, 1, 0, 1)]
# Fixup leading and trailing groups if they show no changes.
if codes[0][0] == 'equal':
tag, i1, i2, j1, j2 = codes[0]