Fixes issue when max_alternatives is more than 1 and confidence is missing.

Author: daspecster

speech/google/cloud/speech/transcript.py

@@ -38,7 +38,7 @@ def from_api_repr(cls, transcript):
         :rtype: :class:`Transcript`
         :returns: Instance of ``Transcript``.
         """
-        return cls(transcript['transcript'], transcript['confidence'])
+        return cls(transcript.get('transcript'), transcript.get('confidence'))
 
     @classmethod
     def from_pb(cls, transcript):

speech/unit_tests/test_transcript.py

@@ -31,3 +31,12 @@ def test_ctor(self):
         self.assertEqual('how old is the Brooklyn Bridge',
                          transcript.transcript)
         self.assertEqual(0.98267895, transcript.confidence)
+
+    def test_from_api_repr_with_no_confidence(self):
+        data = {
+            'transcript': 'testing 1 2 3'
+        }
+
+        transcript = self._getTargetClass().from_api_repr(data)
+        self.assertEqual(transcript.transcript, data['transcript'])
+        self.assertIsNone(transcript.confidence)