docs(samples): remove io dependency in transcribe samples (#223)

* refactor: Refactor transcribe samples into two separate samples (local-file vs gcs) and remove io dependency. Refactor tests.

* Removing CLI in samples and shebangs

* leaving transcribe_async.py in (to be removed later), because speech_transcribe_async_gcs is a required tag.

* Update year in license headers

Co-authored-by: Nick Cain <nicholascain@google.com>

speech/snippets/transcribe_async_file.py

@@ -0,0 +1,60 @@
+# Copyright 2021 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Google Cloud Speech-to-Text sample application using gRPC for async
+batch processing.
+"""
+
+
+# [START speech_transcribe_async]
+def transcribe_file(speech_file):
+    """Transcribe the given audio file asynchronously."""
+    from google.cloud import speech
+
+    client = speech.SpeechClient()
+
+    # [START speech_python_migration_async_request]
+    with open(speech_file, "rb") as audio_file:
+        content = audio_file.read()
+
+    """
+     Note that transcription is limited to a 60 seconds audio file.
+     Use a GCS file for audio longer than 1 minute.
+    """
+    audio = speech.RecognitionAudio(content=content)
+
+    config = speech.RecognitionConfig(
+        encoding=speech.RecognitionConfig.AudioEncoding.LINEAR16,
+        sample_rate_hertz=16000,
+        language_code="en-US",
+    )
+
+    # [START speech_python_migration_async_response]
+
+    operation = client.long_running_recognize(config=config, audio=audio)
+    # [END speech_python_migration_async_request]
+
+    print("Waiting for operation to complete...")
+    response = operation.result(timeout=90)
+
+    # Each result is for a consecutive portion of the audio. Iterate through
+    # them to get the transcripts for the entire audio file.
+    for result in response.results:
+        # The first alternative is the most likely one for this portion.
+        print(u"Transcript: {}".format(result.alternatives[0].transcript))
+        print("Confidence: {}".format(result.alternatives[0].confidence))
+    # [END speech_python_migration_async_response]
+
+
+# [END speech_transcribe_async]

speech/snippets/transcribe_async_file_test.py

@@ -0,0 +1,26 @@
+# Copyright 2021, Google, Inc.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import re
+
+import transcribe_async_file
+
+RESOURCES = os.path.join(os.path.dirname(__file__), "resources")
+
+
+def test_transcribe(capsys):
+    transcribe_async_file.transcribe_file(os.path.join(RESOURCES, "audio.raw"))
+    out, err = capsys.readouterr()
+
+    assert re.search(r"how old is the Brooklyn Bridge", out, re.DOTALL | re.I)

speech/snippets/transcribe_async_gcs.py

@@ -0,0 +1,45 @@
+# Copyright 2021 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Google Cloud Speech-to-Text sample application using the gRPC for async
+batch processing.
+"""
+
+
+# [START speech_transcribe_async_gcs]
+def transcribe_gcs(gcs_uri):
+    """Asynchronously transcribes the audio file specified by the gcs_uri."""
+    from google.cloud import speech
+
+    client = speech.SpeechClient()
+
+    audio = speech.RecognitionAudio(uri=gcs_uri)
+    config = speech.RecognitionConfig(
+        encoding=speech.RecognitionConfig.AudioEncoding.FLAC,
+        sample_rate_hertz=16000,
+        language_code="en-US",
+    )
+
+    operation = client.long_running_recognize(config=config, audio=audio)
+
+    print("Waiting for operation to complete...")
+    response = operation.result(timeout=90)
+
+    # Each result is for a consecutive portion of the audio. Iterate through
+    # them to get the transcripts for the entire audio file.
+    for result in response.results:
+        # The first alternative is the most likely one for this portion.
+        print(u"Transcript: {}".format(result.alternatives[0].transcript))
+        print("Confidence: {}".format(result.alternatives[0].confidence))
+# [END speech_transcribe_async_gcs]

speech/snippets/transcribe_async_test.py → speech/snippets/transcribe_async_gcs_test.py

@@ -1,4 +1,4 @@
-# Copyright 2016, Google, Inc.
+# Copyright 2021, Google, Inc.
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -14,20 +14,14 @@
 import os
 import re
 
-import transcribe_async
+import transcribe_async_gcs
 
 RESOURCES = os.path.join(os.path.dirname(__file__), "resources")
 
 
-def test_transcribe(capsys):
-    transcribe_async.transcribe_file(os.path.join(RESOURCES, "audio.raw"))
-    out, err = capsys.readouterr()
-
-    assert re.search(r"how old is the Brooklyn Bridge", out, re.DOTALL | re.I)
-
-
 def test_transcribe_gcs(capsys):
-    transcribe_async.transcribe_gcs("gs://python-docs-samples-tests/speech/audio.flac")
+    gcs_path = "gs://python-docs-samples-tests/speech/audio.flac"
+    transcribe_async_gcs.transcribe_gcs(gcs_path)
     out, err = capsys.readouterr()
 
     assert re.search(r"how old is the Brooklyn Bridge", out, re.DOTALL | re.I)