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-rw-r--r--google/auth/_credentials_async.py11
1 files changed, 8 insertions, 3 deletions
diff --git a/google/auth/_credentials_async.py b/google/auth/_credentials_async.py
index 760758d..d4d4e2c 100644
--- a/google/auth/_credentials_async.py
+++ b/google/auth/_credentials_async.py
@@ -18,10 +18,13 @@
import abc
import inspect
+import six
+
from google.auth import credentials
-class Credentials(credentials.Credentials, metaclass=abc.ABCMeta):
+@six.add_metaclass(abc.ABCMeta)
+class Credentials(credentials.Credentials):
"""Async inherited credentials class from google.auth.credentials.
The added functionality is the before_request call which requires
async/await syntax.
@@ -81,7 +84,8 @@ class AnonymousCredentials(credentials.AnonymousCredentials, Credentials):
"""
-class ReadOnlyScoped(credentials.ReadOnlyScoped, metaclass=abc.ABCMeta):
+@six.add_metaclass(abc.ABCMeta)
+class ReadOnlyScoped(credentials.ReadOnlyScoped):
"""Interface for credentials whose scopes can be queried.
OAuth 2.0-based credentials allow limiting access using scopes as described
@@ -167,5 +171,6 @@ def with_scopes_if_required(credentials, scopes):
return credentials
-class Signing(credentials.Signing, metaclass=abc.ABCMeta):
+@six.add_metaclass(abc.ABCMeta)
+class Signing(credentials.Signing):
"""Interface for credentials that can cryptographically sign messages."""