update

google/oauth2/_client.py

@@ -23,11 +23,6 @@
 .. _Section 3.1 of rfc6749: https://tools.ietf.org/html/rfc6749#section-3.2
 """
 
-try:
-    from collections.abc import Mapping
-# Python 2.7 compatibility
-except ImportError:  # pragma: NO COVER
-    from collections import Mapping
 import datetime
 import json
 
@@ -112,7 +107,7 @@ def _token_endpoint_request_no_throw(
         body = urllib.parse.urlencode(body).encode("utf-8")
 
     if access_token:
-        headers["Authorization"] = f"Bearer {access_token}"
+        headers["Authorization"] = "Bearer {}".format(access_token)
 
     retry = 0
     # retry to fetch token for maximum of two times if any internal failure

google/oauth2/challenges.py

@@ -19,7 +19,6 @@
 import base64
 import getpass
 import sys
-import warnings
 
 import six
 
@@ -97,7 +96,7 @@ def obtain_challenge_input(self, metadata):
             import pyu2f.convenience.authenticator
             import pyu2f.errors
             import pyu2f.model
-        except ImportError as e:
+        except ImportError:
             sys.stderr.write(
                 "pyu2f is missing. Please install pyu2f to use Security key reauth feature."
             )

google/oauth2/reauth.py

@@ -32,13 +32,13 @@
 3. Refreshing the access token using the returned rapt token.
 """
 
-import json
 import sys
 
+from six.moves import range
+
 from google.auth import exceptions
-from google.oauth2 import challenges
 from google.oauth2 import _client
-from six.moves import range
+from google.oauth2 import challenges
 
 
 _REAUTH_SCOPE = "https://www.googleapis.com/auth/accounts.reauth"
@@ -104,7 +104,7 @@ def _send_challenge_result(
 
     return _client._token_endpoint_request(
         request,
-        _REAUTH_API + f"/{session_id}:continue",
+        _REAUTH_API + "/{}:continue".format(session_id),
         body,
         access_token=access_token,
         use_json=True,
@@ -198,7 +198,7 @@ def _obtain_rapt(request, access_token, requested_scopes, rounds_num=5):
             msg["status"] == _CHALLENGE_REQUIRED or msg["status"] == _CHALLENGE_PENDING
         ):
             raise exceptions.ReauthFailError(
-                f"Reauthentication challenge failed due to API error: {0}".format(
+                "Reauthentication challenge failed due to API error: {}".format(
                     msg["status"]
                 )
             )