1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/sre.py b/Lib/sre.py
index b1ed9fb..6dea5c4 100644
--- a/Lib/sre.py
+++ b/Lib/sre.py
@@ -105,6 +105,11 @@ def _compile(*key):
     _cache[key] = p
     return p
 
+def _expand(pattern, match, template):
+    # internal: match.expand implementation hook
+    template = sre_parse.parse_template(template, pattern)
+    return sre_parse.expand_template(template, match)
+
 def _sub(pattern, template, string, count=0):
     # internal: pattern.sub implementation hook
     return _subn(pattern, template, string, count)[0]