Add support for SORT_RO (#1858)

* add sort_ro

* mark test as onlynon cluster

* delete mark test as onlynoncluster

* skip test

Author: dvora-h

Diff for: redis/commands/core.py

@@ -2724,6 +2724,39 @@ def sort(
         options = {"groups": len(get) if groups else None}
         return self.execute_command("SORT", *pieces, **options)
 
+    def sort_ro(
+        self,
+        key: str,
+        start: Optional[int] = None,
+        num: Optional[int] = None,
+        by: Optional[str] = None,
+        get: Optional[List[str]] = None,
+        desc: bool = False,
+        alpha: bool = False,
+    ) -> list:
+        """
+        Returns the elements contained in the list, set or sorted set at key.
+        (read-only variant of the SORT command)
+
+        ``start`` and ``num`` allow for paging through the sorted data
+
+        ``by`` allows using an external key to weight and sort the items.
+            Use an "*" to indicate where in the key the item value is located
+
+        ``get`` allows for returning items from external keys rather than the
+            sorted data itself.  Use an "*" to indicate where in the key
+            the item value is located
+
+        ``desc`` allows for reversing the sort
+
+        ``alpha`` allows for sorting lexicographically rather than numerically
+
+        For more information check https://redis.io/commands/sort_ro
+        """
+        return self.sort(
+            key, start=start, num=num, by=by, get=get, desc=desc, alpha=alpha
+        )
+
 
 AsyncListCommands = ListCommands
 

Diff for: tests/test_commands.py

@@ -2912,6 +2912,16 @@ def test_sort_all_options(self, r):
         assert num == 4
         assert r.lrange("sorted", 0, 10) == [b"vodka", b"milk", b"gin", b"apple juice"]
 
+    @skip_if_server_version_lt("7.0.0")
+    def test_sort_ro(self, r):
+        r["score:1"] = 8
+        r["score:2"] = 3
+        r["score:3"] = 5
+        r.rpush("a", "3", "2", "1")
+        assert r.sort_ro("a", by="score:*") == [b"2", b"3", b"1"]
+        r.rpush("b", "2", "3", "1")
+        assert r.sort_ro("b", desc=True) == [b"3", b"2", b"1"]
+
     def test_sort_issue_924(self, r):
         # Tests for issue https://github.com/andymccurdy/redis-py/issues/924
         r.execute_command("SADD", "issue#924", 1)