Merge pull request #2613 from daspecster/add-speech-transcript

Use Transcript object in sync and async.

Author: daspecster

google-cloud-speech/google/cloud/speech/__init__.py

@@ -17,3 +17,4 @@
 from google.cloud.speech.client import Client
 from google.cloud.speech.connection import Connection
 from google.cloud.speech.encoding import Encoding
+from google.cloud.speech.transcript import Transcript

google-cloud-speech/google/cloud/speech/client.py

@@ -23,6 +23,7 @@
 from google.cloud.speech.encoding import Encoding
 from google.cloud.speech.operation import Operation
 from google.cloud.speech.sample import Sample
+from google.cloud.speech.transcript import Transcript
 
 
 class Client(client_module.Client):
@@ -195,7 +196,9 @@ def sync_recognize(self, sample, language_code=None,
             method='POST', path='speech:syncrecognize', data=data)
 
         if len(api_response['results']) == 1:
-            return api_response['results'][0]['alternatives']
+            result = api_response['results'][0]
+            return [Transcript.from_api_repr(alternative)
+                    for alternative in result['alternatives']]
         else:
             raise ValueError('result in api should have length 1')
 

google-cloud-speech/google/cloud/speech/operation.py

@@ -124,7 +124,7 @@ def _update(self, response):
         results = []
         if raw_results:
             for result in raw_results[0]['alternatives']:
-                results.append(Transcript(result))
+                results.append(Transcript.from_api_repr(result))
         if metadata:
             self._metadata = Metadata.from_api_repr(metadata)
 

google-cloud-speech/google/cloud/speech/transcript.py

@@ -16,14 +16,29 @@
 
 
 class Transcript(object):
-    """Representation of Speech Transcripts
+    """Representation of Speech Transcripts.
 
-    :type result: dict
-    :param result: Dictionary of transcript and confidence of recognition.
+    :type transcript: str
+    :param transcript: String of transcribed data.
+
+    :type confidence: float
+    :param confidence: The confidence estimate between 0.0 and 1.0.
     """
-    def __init__(self, result):
-        self._transcript = result.get('transcript')
-        self._confidence = result.get('confidence')
+    def __init__(self, transcript, confidence):
+        self._transcript = transcript
+        self._confidence = confidence
+
+    @classmethod
+    def from_api_repr(cls, transcript):
+        """Factory: construct ``Transcript`` from JSON response.
+
+        :type transcript: dict
+        :param transcript: Dictionary response from the REST API.
+
+        :rtype: :class:`~Transcript`
+        :returns: Instance of ``Transcript``.
+        """
+        return cls(transcript['transcript'], transcript['confidence'])
 
     @property
     def transcript(self):

google-cloud-speech/unit_tests/test_client.py

@@ -67,7 +67,9 @@ def test_sync_recognize_content_with_optional_parameters(self):
 
         from google.cloud import speech
         from google.cloud.speech.sample import Sample
+        from google.cloud.speech.transcript import Transcript
         from unit_tests._fixtures import SYNC_RECOGNIZE_RESPONSE
+
         _AUDIO_CONTENT = _to_bytes(self.AUDIO_CONTENT)
         _B64_AUDIO_CONTENT = _bytes_to_unicode(b64encode(_AUDIO_CONTENT))
         RETURNED = SYNC_RECOGNIZE_RESPONSE
@@ -109,12 +111,17 @@ def test_sync_recognize_content_with_optional_parameters(self):
         self.assertEqual(req['method'], 'POST')
         self.assertEqual(req['path'], 'speech:syncrecognize')
 
-        expected = SYNC_RECOGNIZE_RESPONSE['results'][0]['alternatives']
-        self.assertEqual(response, expected)
+        alternative = SYNC_RECOGNIZE_RESPONSE['results'][0]['alternatives'][0]
+        expected = Transcript.from_api_repr(alternative)
+        self.assertEqual(len(response), 1)
+        self.assertIsInstance(response[0], Transcript)
+        self.assertEqual(response[0].transcript, expected.transcript)
+        self.assertEqual(response[0].confidence, expected.confidence)
 
     def test_sync_recognize_source_uri_without_optional_parameters(self):
         from google.cloud import speech
         from google.cloud.speech.sample import Sample
+        from google.cloud.speech.transcript import Transcript
         from unit_tests._fixtures import SYNC_RECOGNIZE_RESPONSE
 
         RETURNED = SYNC_RECOGNIZE_RESPONSE
@@ -144,8 +151,12 @@ def test_sync_recognize_source_uri_without_optional_parameters(self):
         self.assertEqual(req['method'], 'POST')
         self.assertEqual(req['path'], 'speech:syncrecognize')
 
-        expected = SYNC_RECOGNIZE_RESPONSE['results'][0]['alternatives']
-        self.assertEqual(response, expected)
+        expected = Transcript.from_api_repr(
+            SYNC_RECOGNIZE_RESPONSE['results'][0]['alternatives'][0])
+        self.assertEqual(len(response), 1)
+        self.assertIsInstance(response[0], Transcript)
+        self.assertEqual(response[0].transcript, expected.transcript)
+        self.assertEqual(response[0].confidence, expected.confidence)
 
     def test_sync_recognize_with_empty_results(self):
         from google.cloud import speech

google-cloud-speech/unit_tests/test_transcript.py

@@ -26,7 +26,8 @@ def _makeOne(self, *args, **kwargs):
     def test_ctor(self):
         from unit_tests._fixtures import OPERATION_COMPLETE_RESPONSE as DATA
         TRANSCRIPT_DATA = DATA['response']['results'][0]['alternatives'][0]
-        transcript = self._makeOne(TRANSCRIPT_DATA)
+        transcript = self._makeOne(TRANSCRIPT_DATA['transcript'],
+                                   TRANSCRIPT_DATA['confidence'])
         self.assertEqual('how old is the Brooklyn Bridge',
                          transcript.transcript)
         self.assertEqual(0.98267895, transcript.confidence)