Add model management methods to Natural Language Understanding

CHANGELOG.md

@@ -1,6 +1,12 @@
 Change Log
 ==========
 
+## Version unreleased
+
+_2017-??-??_
+
+* Added: Natural Language Understanding model management APIs
+
 ## Version 0.26.0
 
 _2017-05-16_
@@ -9,7 +15,6 @@ _2017-05-16_
 * Added: Tone Analyzer `tone_chat`
 * Fixed: Unicode issues in Python 3
 
-
 ## Version 0.25.2
 
 _2017-03-21_

test/test_natural_language_understanding.py

@@ -122,3 +122,29 @@ def test_url_analyze(self):
                      features.Emotion(document=False)], url="http://cnn.com",
                     xpath="/bogus/xpath", language="en")
         assert len(responses.calls) == 1
+
+    @responses.activate
+    def test_list_models(self):
+        nlu_url = "http://bogus.com/v1/models"
+        responses.add(responses.GET, nlu_url, status=200,
+                      body="{\"resulting_key\": true}",
+                      content_type='application/json')
+        nlu = NaturalLanguageUnderstandingV1(version='2016-01-23',
+                                             url='http://bogus.com',
+                                             username='username',
+                                             password='password')
+        nlu.list_models()
+        assert len(responses.calls) == 1
+
+    @responses.activate
+    def test_delete_model(self):
+        model_id = "invalid_model_id"
+        nlu_url = "http://bogus.com/v1/models/" + model_id
+        responses.add(responses.DELETE, nlu_url, status=200,
+                      body="{}", content_type='application/json')
+        nlu = NaturalLanguageUnderstandingV1(version='2016-01-23',
+                                             url='http://bogus.com',
+                                             username='username',
+                                             password='password')
+        nlu.delete_model(model_id)
+        assert len(responses.calls) == 1

watson_developer_cloud/natural_language_understanding_v1.py

@@ -82,3 +82,24 @@ def analyze(self, features, text=None, url=None, html=None,
                             headers={'content-type': 'application/json'},
                             json=body,
                             accept_json=True)
+
+    def list_models(self):
+        """
+        Lists the custom models available for your service instance
+        :return: dict of available custom models
+        """
+        return self.request(method='GET', url='/v1/models',
+                            params={"version": self.version},
+                            accept_json=True)
+
+    def delete_model(self, model_id):
+        """
+        Deletes a custom model
+        :param model_id: The ID of the model to delete
+        :return: dict with status of model deletion
+        """
+
+        return self.request(method='DELETE',
+                            url='/v1/models/{0}'.format(model_id),
+                            params={"version": self.version},
+                            accept_json=True)