handling GoogleCredentials import error

Author: mhaseebtariq

pandas/io/gbq.py

@@ -52,7 +52,6 @@ def _test_google_api_imports():
         except:
             from apiclient.discovery import build  # noqa
             from apiclient.errors import HttpError  # noqa
-        from oauth2client.client import GoogleCredentials  # noqa
         from oauth2client.client import AccessTokenRefreshError  # noqa
         from oauth2client.client import OAuth2WebServerFlow  # noqa
         from oauth2client.file import Storage  # noqa
@@ -193,7 +192,10 @@ def get_application_default_credentials(self):
             from googleapiclient.discovery import build
         except ImportError:
             from apiclient.discovery import build
-        from oauth2client.client import GoogleCredentials
+        try:
+            from oauth2client.client import GoogleCredentials
+        except ImportError:
+            return None
 
         try:
             credentials = GoogleCredentials.get_application_default()

pandas/io/tests/test_gbq.py

@@ -80,7 +80,6 @@ def _test_imports():
                 from apiclient.discovery import build  # noqa
                 from apiclient.errors import HttpError  # noqa
 
-            from oauth2client.client import GoogleCredentials  # noqa
             from oauth2client.client import OAuth2WebServerFlow  # noqa
             from oauth2client.client import AccessTokenRefreshError  # noqa
 
@@ -157,12 +156,12 @@ def _check_if_can_get_correct_default_credentials():
     # from the environment the tests are running in.
     # See Issue #13577
     test_requirements()
-    from oauth2client.client import GoogleCredentials
     try:
         from googleapiclient.discovery import build
     except ImportError:
         from apiclient.discovery import build
     try:
+        from oauth2client.client import GoogleCredentials
         credentials = GoogleCredentials.get_application_default()
         bigquery_service = build('bigquery', 'v2', credentials=credentials)
         jobs = bigquery_service.jobs()