René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"'_implicit_environ.compute_engine_id()' may raise","articleBody":"I just saw this while running tests:\n\n```\nERROR: test_set_explicit_None_wo_env_var_set (gcloud.datastore.test___init__.Test_set_default_dataset_id)\n----------------------------------------------------------------------\nTraceback (most recent call last):\n  File \"/home/tseaver/projects/agendaless/Google/src/gcloud-python/gcloud/datastore/test___init__.py\", line 71, in test_set_explicit_None_wo_env_var_set\n    self._callFUT(None)\n  File \"/home/tseaver/projects/agendaless/Google/src/gcloud-python/gcloud/datastore/test___init__.py\", line 31, in _callFUT\n    return set_default_dataset_id(dataset_id=dataset_id)\n  File \"/home/tseaver/projects/agendaless/Google/src/gcloud-python/gcloud/datastore/__init__.py\", line 91, in set_default_dataset_id\n    dataset_id = _implicit_environ.compute_engine_id()\n  File \"/home/tseaver/projects/agendaless/Google/src/gcloud-python/gcloud/datastore/_implicit_environ.py\", line 73, in compute_engine_id\n    response, content = http.request(uri, method='GET', headers=headers)\n  File \"/home/tseaver/projects/agendaless/Google/src/gcloud-python/.tox/cover/lib/python2.7/site-packages/httplib2/__init__.py\", line 1593, in request\n    (response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)\n  File \"/home/tseaver/projects/agendaless/Google/src/gcloud-python/.tox/cover/lib/python2.7/site-packages/httplib2/__init__.py\", line 1335, in _request\n    (response, content) = self._conn_request(conn, request_uri, method, body, headers)\n  File \"/home/tseaver/projects/agendaless/Google/src/gcloud-python/.tox/cover/lib/python2.7/site-packages/httplib2/__init__.py\", line 1291, in _conn_request\n    response = conn.getresponse()\n  File \"/opt/Python-2.7.9/lib/python2.7/httplib.py\", line 1061, in getresponse\n    raise ResponseNotReady()\n```\n","author":{"url":"https://github.com/tseaver","@type":"Person","name":"tseaver"},"datePublished":"2015-01-28T22:41:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/575/google-cloud-python/issues/575"}