Translate: migrate published samples [(#2768)](#2768)

Migrate from tmp-generated-samples branch 615c08e
Remove boilerplate
Update copyright date
Blacken
Remove unused imports

translation/samples/snippets/translate_v3_detect_language.py

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+# Copyright 2020 Google LLC
+#
+# 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
+#
+#     https://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.
+
+# [START translate_v3_detect_language]
+from google.cloud import translate
+
+
+def sample_detect_language(project_id="YOUR_PROJECT_ID"):
+    """Detecting the language of a text string."""
+
+    client = translate.TranslationServiceClient()
+
+    parent = client.location_path(project_id, "global")
+
+    # Detail on supported types can be found here:
+    # https://cloud.google.com/translate/docs/supported-formats
+    response = client.detect_language(
+        content="Hello, world!",
+        parent=parent,
+        mime_type="text/plain",  # mime types: text/plain, text/html
+    )
+
+    # Display list of detected languages sorted by detection confidence.
+    # The most probable language is first.
+    for language in response.languages:
+        # The language detected
+        print(u"Language code: {}".format(language.language_code))
+        # Confidence of detection result for this language
+        print(u"Confidence: {}".format(language.confidence))
+
+
+# [END translate_v3_detect_language]

translation/samples/snippets/translate_v3_detect_language_test.py

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+# Copyright 2020 Google LLC
+#
+# 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 translate_v3_detect_language
+
+PROJECT_ID = os.environ["GCLOUD_PROJECT"]
+
+
+def test_detect_language(capsys):
+    translate_v3_detect_language.sample_detect_language(PROJECT_ID)
+    out, _ = capsys.readouterr()
+    assert "en" in out

translation/samples/snippets/translate_v3_get_supported_languages.py

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+# Copyright 2020 Google LLC
+#
+# 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
+#
+#     https://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.
+
+# [START translate_v3_get_supported_languages]
+from google.cloud import translate
+
+
+def sample_get_supported_languages(project_id="YOUR_PROJECT_ID"):
+    """Getting a list of supported language codes."""
+
+    client = translate.TranslationServiceClient()
+
+    parent = client.location_path(project_id, "global")
+
+    response = client.get_supported_languages(parent=parent)
+
+    # List language codes of supported languages.
+    print("Supported Languages:")
+    for language in response.languages:
+        print(u"Language Code: {}".format(language.language_code))
+
+
+# [END translate_v3_get_supported_languages]

translation/samples/snippets/translate_v3_get_supported_languages_test.py

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+# Copyright 2020 Google LLC
+#
+# 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 translate_v3_get_supported_languages
+
+PROJECT_ID = os.environ["GCLOUD_PROJECT"]
+
+
+def test_list_languages(capsys):
+    translate_v3_get_supported_languages.sample_get_supported_languages(PROJECT_ID)
+    out, _ = capsys.readouterr()
+    assert "zh-CN" in out