1 files changed, 11 insertions, 1 deletions
diff --git a/redis/client.py b/redis/client.py
index 28e3ac1..f50c27e 100755
--- a/redis/client.py
+++ b/redis/client.py
@@ -615,7 +615,7 @@ class Redis:
             lambda r: r and set(r) or set()
         ),
         **string_keys_to_dict(
-            'ZPOPMAX ZPOPMIN ZINTER ZDIFF ZRANGE ZRANGEBYSCORE '
+            'ZPOPMAX ZPOPMIN ZINTER ZDIFF ZUNION ZRANGE ZRANGEBYSCORE '
             'ZREVRANGE ZREVRANGEBYSCORE', zset_score_pairs
         ),
         **string_keys_to_dict('BZPOPMIN BZPOPMAX', \
@@ -3416,6 +3416,16 @@ class Redis:
         "Return the score of element ``value`` in sorted set ``name``"
         return self.execute_command('ZSCORE', name, value)
 
+    def zunion(self, keys, aggregate=None, withscores=False):
+        """
+        Return the union of multiple sorted sets specified by ``keys``.
+        ``keys`` can be provided as dictionary of keys and their weights.
+        Scores will be aggregated based on the ``aggregate``, or SUM if
+        none is provided.
+        """
+        return self._zaggregate('ZUNION', None, keys, aggregate,
+                                withscores=withscores)
+
     def zunionstore(self, dest, keys, aggregate=None):
         """
         Union multiple sorted sets specified by ``keys`` into