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-rw-r--r--Lib/sre_parse.py2
-rw-r--r--Lib/test/test_re.py6
-rw-r--r--Misc/NEWS3
3 files changed, 10 insertions, 1 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py
index 6411475..1298d48 100644
--- a/Lib/sre_parse.py
+++ b/Lib/sre_parse.py
@@ -245,7 +245,7 @@ def _class_escape(source, escape):
if code:
return code
code = CATEGORIES.get(escape)
- if code:
+ if code and code[0] == IN:
return code
try:
c = escape[1:2]
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index b945203..feae7c5 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -949,6 +949,12 @@ class ReTests(unittest.TestCase):
# Test behaviour when not given a string or pattern as parameter
self.assertRaises(TypeError, re.compile, 0)
+ def test_bug_13899(self):
+ # Issue #13899: re pattern r"[\A]" should work like "A" but matches
+ # nothing. Ditto B and Z.
+ self.assertEqual(re.findall(r'[\A\B\b\C\Z]', 'AB\bCZ'),
+ ['A', 'B', '\b', 'C', 'Z'])
+
@bigmemtest(size=_2G, memuse=1)
def test_large_search(self, size):
# Issue #10182: indices were 32-bit-truncated.
diff --git a/Misc/NEWS b/Misc/NEWS
index 1d12d26..1633879 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -144,6 +144,9 @@ Library
- Issue #16900: Issue a ResourceWarning when an ssl socket is left unclosed.
+- Issue #13899: \A, \Z, and \B now correctly match the A, Z, and B literals
+ when used inside character classes (e.g. '[\A]'). Patch by Matthew Barnett.
+
- Issue #15545: Fix regression in sqlite3's iterdump method where it was
failing if the connection used a row factory (such as sqlite3.Row) that
produced unsortable objects. (Regression was introduced by fix for 9750).