AttributeError: 'Credentials' object has no attribute 'authorize'

[Fkawala]

Hello,

To run this snippet :

import google
import google.cloud.logging
import google.cloud.logging.handlers 

client = google.cloud.logging.Client()
handler = google.cloud.logging.handlers.CloudLoggingHandler(client=client, name="xyz")

Fails as follow

Traceback (most recent call last):
  File "s.py", line 6, in <module>
    handler = google.cloud.logging.handlers.CloudLoggingHandler(client=client, name="xyz")
  File "/path/to/venv/lib/python3.5/site-packages/google/cloud/logging/handlers/handlers.py", line 80, in __init__
    self.transport = transport(client, name)
  File "/path/to/venv/lib/python3.5/site-packages/google/cloud/logging/handlers/transports/background_thread.py", line 154, in __init__
    http = client._connection.credentials.authorize(http)
AttributeError: 'Credentials' object has no attribute 'authorize'

I test this in a fresh virtualenv whose freeze shows

enum34==1.1.6
future==0.16.0
gapic-google-logging-v2==0.10.1
google-auth==0.4.0
google-auth-httplib2==0.0.2
google-cloud-core==0.22.0
google-cloud-logging==0.21.0
google-gax==0.14.1
googleapis-common-protos==1.5.0
grpc-google-logging-v2==0.10.1
grpcio==1.0.1
httplib2==0.9.2
oauth2client==4.0.0
ply==3.8
protobuf==3.1.0.post1
pyasn1==0.1.9
pyasn1-modules==0.0.8
rsa==3.4.2
six==1.10.0

pip show google-cloud-logging shows

Name: google-cloud-logging
Version: 0.21.0
Summary: Python Client for Stackdriver Logging
Home-page: https://github.com/GoogleCloudPlatform/google-cloud-python
Author: Google Cloud Platform
Author-email: jjg+google-cloud-python@google.com
License: Apache 2.0
Location: /path/to/venv/lib/python3.5/site-packages
Requires: google-gax, gapic-google-logging-v2, grpc-google-logging-v2, grpcio, google-cloud-core

and pip show google-cloud-core shows

Name: google-cloud-core
Version: 0.22.0
Summary: API Client library for Google Cloud: Core Helpers
Home-page: https://github.com/GoogleCloudPlatform/google-cloud-python
Author: Google Cloud Platform
Author-email: jjg+google-cloud-python@google.com
License: Apache 2.0
Location: /path/to/venv/lib/python3.5/site-packages
Requires: protobuf, google-auth-httplib2, six, httplib2, google-auth, googleapis-common-protos

I do this test in a blank directory with only the json credentials and the above mentioned script. To run the snippet I do GCLOUD_PROJECT=my-project GOOGLE_APPLICATION_CREDENTIALS=my-cred.json python snippet.py

Could it had something to do with the new version of google-cloud-core (0.22.0 published 2016-12-06) ?

Bests,
François.

[Fkawala]

To downgrade google-cloud-core to version 0.21.0 "solves" the problem.

[theacodes]

@dhermes this is why we released 0.21.1, right?

[dhermes]

@jonparrott beat me to it @Fkawala. I stupidly relesed 0.21.0 without version upper bounds, so 0.21.1 is the exact same release, except putting upper bounds on the subpackages (and bumping the version for HappyBase, which is also the same code).

#2828 will at least improve the messaging.

[PLPeeters]

This issue is present again with version 0.27.0. Downgrading to 0.26.1 solves the issue.

[Fkawala]

@PLPeeters ditto !

[viyh]

+1

[william-silversmith]

I'm sort of caught between a rock and a hard place. 0.26.1 is not thread safe, but works sporadically. 0.27 seems to be thread safe, but has this issue inside of docker containers for some reason. I'll report more information once I figure out the exact issue.

[william-silversmith]

FYI it looks like the issue is caused by HAS_GOOGLE_AUTH being False:

    import google.auth
    import google.auth.credentials
    import google_auth_httplib2
    HAS_GOOGLE_AUTH = True
except ImportError:  # pragma: NO COVER
    HAS_GOOGLE_AUTH = False

It can be mitigated by running pip install google-auth-httplib2. By the way, the instruction is missing the 'p' in httplib2 on this page: https://pypi.python.org/pypi/google-auth-httplib2