fixed problems in #143

tests/test_commands.py

@@ -1320,6 +1320,26 @@ def test_get_and_set(self, r):
         assert r.get("integer") == str(integer).encode()
         assert r.get("unicode_string").decode("utf-8") == unicode_string
 
+    def test_set_options_mutually_exclusive(self, r):
+        with pytest.raises(exceptions.DataError):
+            r.set("test", 1, ex=1, px=1)
+
+        with pytest.raises(exceptions.DataError):
+            r.set("test2", 2, exat=3, pxat=5)
+
+        with pytest.raises(exceptions.DataError):
+            r.set("test3", 3, ex=5, exat=1)
+
+    def test_set_options_type_check(self, r):
+        with pytest.raises(exceptions.DataError):
+            r.set("test", 1, ex="hi")
+
+        with pytest.raises(exceptions.DataError):
+            r.set("test1", 3, px=object())
+
+        with pytest.raises(exceptions.DataError):
+            r.set("test3", 1, pxat=3j)
+
     @skip_if_server_version_lt("6.2.0")
     def test_getdel(self, r):
         assert r.getdel("a") is None

valkey/commands/core.py

@@ -2287,6 +2287,11 @@ def set(
 
         For more information see https://valkey.io/commands/set
         """
+        params = sum(op is not None for op in [ex, px, exat, pxat])
+        if params > 1:
+            raise DataError(
+                "``ex``, ``px``, ``exat`` and ``pxat`` " "are mutually exclusive."
+            )
         pieces: list[EncodableT] = [name, value]
         options = {}
         if ex is not None: