app engine standard environment call bigquery python - python-2.7

Question

I am trying to deploy a simple standard app engine in python and from there to make bigquery queries through python bigquery client.
The code is as simple as these:
from __future__ import absolute_import
import webapp2
import os
from google.cloud import bigquery
class MainPage(webapp2.RequestHandler):
def get(self):
client = bigquery.Client(project = "ancient-ceiling-125223")
project_name = str(client.project)
query_job = client.query("select 1")
assert query_job.state == 'RUNNING'
iterator = query_job.result(timeout= 30)
rows = list(iterator)
self.response.write('nothing to see %s' % (project_name))
app = webapp2.WSGIApplication(
[('/', MainPage)], debug=True)
The error log: The error appears in the dummy query request
*('Connection broken: IncompleteRead(209 bytes read)', IncompleteRead(209 bytes read)) (/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py:1528)
Traceback (most recent call last):
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1511, in __call__
rv = self.handle_exception(request, response, e)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1505, in __call__
rv = self.router.dispatch(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1253, in default_dispatcher
return route.handler_adapter(request, response)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 1077, in __call__
return handler.dispatch()
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 547, in dispatch
return self.handle_exception(e, self.app.debug)
File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.3/webapp2.py", line 545, in dispatch
return method(*args, **kwargs)
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/main.py", line 35, in get
query_job = client.query("select 1")
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/cloud/bigquery/client.py", line 986, in query
job._begin(retry=retry)
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/cloud/bigquery/job.py", line 397, in _begin
method='POST', path=path, data=self._build_resource())
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/cloud/bigquery/client.py", line 271, in _call_api
return call()
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/api_core/retry.py", line 260, in retry_wrapped_func
on_error=on_error,
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/api_core/retry.py", line 177, in retry_target
return target()
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/cloud/_http.py", line 290, in api_request
headers=headers, target_object=_target_object)
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/cloud/_http.py", line 183, in _make_request
return self._do_request(method, url, headers, data, target_object)
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/cloud/_http.py", line 212, in _do_request
url=url, method=method, headers=headers, data=data)
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/google/auth/transport/requests.py", line 186, in request
method, url, data=data, headers=request_headers, **kwargs)
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/requests/sessions.py", line 502, in request
resp = self.send(prep, **send_kwargs)
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/requests/sessions.py", line 652, in send
r.content
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/requests/models.py", line 825, in content
self._content = bytes().join(self.iter_content(CONTENT_CHUNK_SIZE)) or bytes()
File "/base/data/home/apps/s~ancient-ceiling-125223/20171115t104156.405543624689752939/lib/requests/models.py", line 750, in generate
raise ChunkedEncodingError(e)
ChunkedEncodingError: ('Connection broken: IncompleteRead(209 bytes read)', IncompleteRead(209 bytes read))*

Answer 1

I could not make it work using python bigquery client library, Here is what I found working in standard app engine environment,
from __future__ import absolute_import
import webapp2
from googleapiclient.discovery import build
from oauth2client.client import GoogleCredentials
class MainPage(webapp2.RequestHandler):
def get(self):
credentials = GoogleCredentials.get_application_default()
service = build('bigquery', 'v2', credentials=credentials)
datasets = service.datasets().list(projectId="ancient-ceiling-125223").execute()
self.response.write('datasets: %s' % datasets)
app = webapp2.WSGIApplication(
[('/', MainPage)], debug=True)