Disentangle import cycles #260
Description
Some local non-testing imports are explicitly marked as related to cycles:
$ git grep -n circular
gcloud/datastore/dataset.py:125: # This import is here to avoid circular
gcloud/datastore/entity.py:157: # This is here to avoid circular imports.
Others are not so marked:
gcloud/datastore/__init__.py:64: from gcloud import credentials
gcloud/datastore/__init__.py:65: from gcloud.datastore.connection import Connection
gcloud/datastore/dataset.py:73: from gcloud.datastore.query import Query
gcloud/datastore/dataset.py:86: from gcloud.datastore.entity import Entity
gcloud/datastore/dataset.py:99: from gcloud.datastore.transaction import Transaction
gcloud/storage/__init__.py:65: from gcloud import credentials
gcloud/storage/__init__.py:66: from gcloud.storage.connection import Connection
gcloud/storage/iterator.py:158: from gcloud.storage.bucket import Bucket
gcloud/storage/iterator.py:186: from gcloud.storage.key import Key
We should refactor to fix the cycles, allowing us to normalize those imports.