fix: use (new) typing for 'gapic_v1.method.DEFAULT' (#1032)

Relies on merge of googleapis/python-api-core#292,
but falls back to current (unsat) typing on older versions.

Co-authored-by: Bu Sun Kim <[email protected]>

Author: tseaver

gapic/ads-templates/%namespace/%name/%version/%sub/services/%service/client.py.j2

@@ -22,7 +22,10 @@ from google.auth.transport.grpc import SslCredentials             # type: ignore
 from google.auth.exceptions import MutualTLSChannelError          # type: ignore
 from google.oauth2 import service_account                         # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 {% filter sort_lines %}
 {% for method in service.methods.values() %}

gapic/templates/%namespace/%name_%version/%sub/services/%service/async_client.py.j2

@@ -18,7 +18,10 @@ from google.api_core import retry as retries           # type: ignore
 from google.auth import credentials as ga_credentials   # type: ignore
 from google.oauth2 import service_account              # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 {% filter sort_lines %}
 {% for method in service.methods.values() %}

gapic/templates/%namespace/%name_%version/%sub/services/%service/client.py.j2

@@ -22,7 +22,10 @@ from google.auth.transport.grpc import SslCredentials             # type: ignore
 from google.auth.exceptions import MutualTLSChannelError          # type: ignore
 from google.oauth2 import service_account                         # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 {% filter sort_lines %}
 {% for method in service.methods.values() %}

gapic/templates/%namespace/%name_%version/%sub/services/%service/transports/rest.py.j2

@@ -15,7 +15,11 @@ from requests import __version__ as requests_version
 from typing import Callable, Dict, Optional, Sequence, Tuple, Union
 import warnings
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
+
 {% extends '_base.py.j2' %}
 
 {% block content %}

tests/integration/goldens/asset/google/cloud/asset_v1/services/asset_service/async_client.py

@@ -26,7 +26,10 @@
 from google.auth import credentials as ga_credentials   # type: ignore
 from google.oauth2 import service_account              # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 from google.api_core import operation  # type: ignore
 from google.api_core import operation_async  # type: ignore

tests/integration/goldens/asset/google/cloud/asset_v1/services/asset_service/client.py

@@ -30,7 +30,10 @@
 from google.auth.exceptions import MutualTLSChannelError          # type: ignore
 from google.oauth2 import service_account                         # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 from google.api_core import operation  # type: ignore
 from google.api_core import operation_async  # type: ignore

tests/integration/goldens/credentials/google/iam/credentials_v1/services/iam_credentials/async_client.py

@@ -26,7 +26,10 @@
 from google.auth import credentials as ga_credentials   # type: ignore
 from google.oauth2 import service_account              # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 from google.iam.credentials_v1.types import common
 from google.protobuf import duration_pb2  # type: ignore

tests/integration/goldens/credentials/google/iam/credentials_v1/services/iam_credentials/client.py

@@ -30,7 +30,10 @@
 from google.auth.exceptions import MutualTLSChannelError          # type: ignore
 from google.oauth2 import service_account                         # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 from google.iam.credentials_v1.types import common
 from google.protobuf import duration_pb2  # type: ignore

tests/integration/goldens/logging/google/cloud/logging_v2/services/config_service_v2/async_client.py

@@ -26,7 +26,10 @@
 from google.auth import credentials as ga_credentials   # type: ignore
 from google.oauth2 import service_account              # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 from google.cloud.logging_v2.services.config_service_v2 import pagers
 from google.cloud.logging_v2.types import logging_config

tests/integration/goldens/logging/google/cloud/logging_v2/services/config_service_v2/client.py

@@ -30,7 +30,10 @@
 from google.auth.exceptions import MutualTLSChannelError          # type: ignore
 from google.oauth2 import service_account                         # type: ignore
 
-OptionalRetry = Union[retries.Retry, object]
+try:
+    OptionalRetry = Union[retries.Retry, gapic_v1.method._MethodDefault]
+except AttributeError:
+    OptionalRetry = Union[retries.Retry, object]
 
 from google.cloud.logging_v2.services.config_service_v2 import pagers
 from google.cloud.logging_v2.types import logging_config