chore: use gapic-generator-python 1.0.0 (#97)

- [ ] Regenerate this pull request now. PiperOrigin-RevId: 451250442 Source-Link: googleapis/googleapis@cca5e81 Source-Link: https://github.com/googleapis/googleapis-gen/commit/0b219da161a8bdcc3c6f7b2efcd82105182a30ca Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMGIyMTlkYTE2MWE4YmRjYzNjNmY3YjJlZmNkODIxMDUxODJhMzBjYSJ9

Author: gcf-owl-bot[bot]

tests/unit/gapic/network_security_v1beta1/test_network_security.py

@@ -13,9 +13,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-import math
 import os
 
+# try/except added for compatibility with python < 3.8
+try:
+ from unittest import mock
+ from unittest.mock import AsyncMock
+except ImportError:
+ import mock
+
+import math
+
 from google.api_core import (
  future,
  gapic_v1,
@@ -37,7 +45,6 @@
 from google.protobuf import timestamp_pb2 # type: ignore
 import grpc
 from grpc.experimental import aio
-import mock
 from proto.marshal.rules.dates import DurationRule, TimestampRule
 import pytest