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Lib/site-packages/django/contrib/postgres/serializers.py

@@ -0,0 +1,10 @@
+from django.db.migrations.serializer import BaseSerializer
+
+
+class RangeSerializer(BaseSerializer):
+    def serialize(self):
+        module = self.value.__class__.__module__
+        # Ranges are implemented in psycopg2._range but the public import
+        # location is psycopg2.extras.
+        module = 'psycopg2.extras' if module == 'psycopg2._range' else module
+        return '%s.%r' % (module, self.value), {'import %s' % module}