Update translation

CONTRIBUTING.rst

@@ -235,8 +235,6 @@ Running System Tests
     `docs <https://cloud.google.com/storage/docs/authentication#generating-a-private-key>`__
     for more details. In order for Logging system tests to work, the Service Account
     will also have to be made a project Owner. This can be changed under "IAM & Admin".
-  - ``GOOGLE_CLOUD_TESTS_API_KEY``: The API key for your project with
-    the Google Translate API (and others) enabled.
 
 - Examples of these can be found in ``system_tests/local_test_setup.sample``. We
   recommend copying this to ``system_tests/local_test_setup``, editing the

system_tests/local_test_setup.sample

@@ -1,4 +1,3 @@
 export GOOGLE_APPLICATION_CREDENTIALS="app_credentials.json.sample"
 export GOOGLE_CLOUD_TESTING_REMOTE="upstream"
 export GOOGLE_CLOUD_TESTING_BRANCH="master"
-export GOOGLE_CLOUD_TESTS_API_KEY="abcd1234"

system_tests/translate.py

@@ -13,16 +13,11 @@
 # limitations under the License.
 
 
-import os
-
 import unittest
 
 from google.cloud import translate
 
 
-ENV_VAR = 'GOOGLE_CLOUD_TESTS_API_KEY'
-
-
 class Config(object):
     """Run-time configuration to be modified at set-up.
 
@@ -33,8 +28,7 @@ class Config(object):
 
 
 def setUpModule():
-    api_key = os.getenv(ENV_VAR)
-    Config.CLIENT = translate.Client(api_key=api_key)
+    Config.CLIENT = translate.Client()
 
 
 class TestTranslate(unittest.TestCase):
@@ -61,8 +55,8 @@ def test_detect_language(self):
     def test_translate(self):
         values = ['hvala ti', 'dankon',
                   'Me llamo Jeff', 'My name is Jeff']
-        translations = Config.CLIENT.translate(values,
-                                               target_language='de')
+        translations = Config.CLIENT.translate(
+            values, target_language='de', model=translate.NMT)
         self.assertEqual(len(values), len(translations))
 
         self.assertEqual(

translate/google/cloud/translate/__init__.py

@@ -14,5 +14,7 @@
 
 """Google Cloud Translate API wrapper."""
 
+from google.cloud.translate.client import BASE
 from google.cloud.translate.client import Client
+from google.cloud.translate.client import NMT
 from google.cloud.translate.connection import Connection

translate/google/cloud/translate/client.py

@@ -19,37 +19,57 @@
 import six
 
 from google.cloud._helpers import _to_bytes
+from google.cloud.client import Client as BaseClient
 from google.cloud.translate.connection import Connection
 
 
 ENGLISH_ISO_639 = 'en'
 """ISO 639-1 language code for English."""
 
+BASE = 'base'
+"""Base translation model."""
 
-class Client(object):
-    """Client to bundle configuration needed for API requests.
+NMT = 'nmt'
+"""Neural Machine Translation model."""
 
-    :type api_key: str
-    :param api_key: The key used to send with requests as a query
-                    parameter.
 
-    :type http: :class:`httplib2.Http` or class that defines ``request()``.
-    :param http: (Optional) HTTP object to make requests. If not
-                 passed, an :class:`httplib.Http` object is created.
+class Client(BaseClient):
+    """Client to bundle configuration needed for API requests.
 
     :type target_language: str
     :param target_language: (Optional) The target language used for
                             translations and language names. (Defaults to
                             :data:`ENGLISH_ISO_639`.)
+
+    :type api_key: str
+    :param api_key: (Optional) The key used to send with requests as a
+                    query parameter.
+
+    :type credentials: :class:`oauth2client.client.OAuth2Credentials`
+    :param credentials: (Optional) The OAuth2 Credentials to use for the
+                        connection owned by this client. If not passed (and
+                        if no ``http`` object is passed), falls back to the
+                        default inferred from the environment.
+
+    :type http: :class:`httplib2.Http` or class that defines ``request()``.
+    :param http: (Optional) HTTP object to make requests. If not
+                 passed, an :class:`httplib.Http` object is created.
     """
 
-    def __init__(self, api_key, http=None, target_language=ENGLISH_ISO_639):
+    _connection_class = Connection
+
+    def __init__(self, target_language=ENGLISH_ISO_639, api_key=None,
+                 credentials=None, http=None):
         self.api_key = api_key
-        if http is None:
-            http = httplib2.Http()
-        self._connection = Connection(http=http)
         self.target_language = target_language
 
+        if api_key is not None:
+            # If API key auth is desired, make it so that no credentials
+            # will be auto-detected by the base class constructor.
+            if http is None:
+                http = httplib2.Http()
+        super(Client, self).__init__(credentials=credentials, http=http)
+
     def get_languages(self, target_language=None):
         """Get list of supported languages for translation.
 
@@ -70,7 +90,9 @@ def get_languages(self, target_language=None):
                   dictionary will also contain the name of each supported
                   language (localized to the target language).
         """
-        query_params = {'key': self.api_key}
+        query_params = {}
+        if self.api_key is not None:
+            query_params['key'] = self.api_key
         if target_language is None:
             target_language = self.target_language
         if target_language is not None:
@@ -114,7 +136,9 @@ def detect_language(self, values):
             single_value = True
             values = [values]
 
-        query_params = [('key', self.api_key)]
+        query_params = []
+        if self.api_key is not None:
+            query_params.append(('key', self.api_key))
         query_params.extend(('q', _to_bytes(value, 'utf-8'))
                             for value in values)
         response = self._connection.api_request(
@@ -146,7 +170,8 @@ def detect_language(self, values):
             return detections
 
     def translate(self, values, target_language=None, format_=None,
-                  source_language=None, customization_ids=()):
+                  source_language=None, customization_ids=(),
+                  model=None):
         """Translate a string or list of strings.
 
         See: https://cloud.google.com/translate/v2/\
@@ -173,7 +198,11 @@ def translate(self, values, target_language=None, format_=None,
                                   for translation. Sets the ``cid`` parameter
                                   in the query.
 
-        :rtype: str or list list
+        :type model: str
+        :param model: (Optional) The model used to translate the text. The
+                      only accepted values are :attr:`BASE` and :attr:`NMT`.
+
+        :rtype: str or list
         :returns: A list of dictionaries for each queried value. Each
                   dictionary typically contains three keys (though not
                   all will be present in all cases)
@@ -183,10 +212,11 @@ def translate(self, values, target_language=None, format_=None,
                   * ``translatedText``: The translation of the text into the
                     target language.
                   * ``input``: The corresponding input value.
+                  * ``model``: The model used to translate the text.
 
                   If only a single value is passed, then only a single
                   dictionary will be returned.
-        :raises: :class:`ValueError <exceptions.ValueError>` if the number of
+        :raises: :class:`~exceptions.ValueError` if the number of
                  values and translations differ.
         """
         single_value = False
@@ -199,14 +229,18 @@ def translate(self, values, target_language=None, format_=None,
         if isinstance(customization_ids, six.string_types):
             customization_ids = [customization_ids]
 
-        query_params = [('key', self.api_key), ('target', target_language)]
+        query_params = [('target', target_language)]
+        if self.api_key is not None:
+            query_params.append(('key', self.api_key))
         query_params.extend(('q', _to_bytes(value, 'utf-8'))
                             for value in values)
         query_params.extend(('cid', cid) for cid in customization_ids)
         if format_ is not None:
             query_params.append(('format', format_))
         if source_language is not None:
             query_params.append(('source', source_language))
+        if model is not None:
+            query_params.append(('model', model))
 
         response = self._connection.api_request(
             method='GET', path='', query_params=query_params)

translate/google/cloud/translate/connection.py

@@ -20,11 +20,14 @@
 class Connection(_http.JSONConnection):
     """A connection to Google Cloud Translate via the JSON REST API."""
 
-    API_BASE_URL = 'https://www.googleapis.com'
+    API_BASE_URL = 'https://translation.googleapis.com'
     """The base of the API call URL."""
 
     API_VERSION = 'v2'
     """The version of the API, used in building the API call's URL."""
 
     API_URL_TEMPLATE = '{api_base_url}/language/translate/{api_version}{path}'
     """A template for the URL of a particular API call."""
+
+    SCOPE = ('https://www.googleapis.com/auth/cloud-platform',)
+    """The scopes required for authenticating."""

translate/tox.ini

@@ -6,6 +6,7 @@ envlist =
 localdeps =
     pip install --quiet --upgrade {toxinidir}/../core
 deps =
+    mock
     pytest
 covercmd =
     py.test --quiet \