Added delete option to database storage.

venv/Lib/site-packages/grpc/aio/_utils.py

@@ -0,0 +1,22 @@
+# Copyright 2019 gRPC authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Internal utilities used by the gRPC Aio module."""
+import time
+from typing import Optional
+
+
+def _timeout_to_deadline(timeout: Optional[float]) -> Optional[float]:
+    if timeout is None:
+        return None
+    return time.time() + timeout