Moved the imports and region tags inside the functions [(#1891)](GoogleCloudPlatform/python-docs-samples#1891)

* Moved the imports and region tags inside the functions

* Removed the unnecessary imports

* Added the missing import (six) to the functions

* Removed the extra whitespaces

* Changes based on Alix's comments.
- Sample files no longer have input arguments
- Input texts and uri's are hard coded
- unit tests are modified accordingly

* Remove extra whitespace

* Removed extra whitespaces

* Removed unused import

* Removed the extra + signs

Author: happyhuman

samples/snippets/cloud-client/v1/snippets.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-# Copyright 2016 Google, Inc.
+# Copyright 2018 Google, LLC.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -24,15 +24,16 @@
 import argparse
 import sys
 
-from google.cloud import language
-from google.cloud.language import enums
-from google.cloud.language import types
-import six
 
+def sentiment_text():
+    # [START language_sentiment_text]
+    import six
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
+
+    text = 'Hello, world!'
 
-# [START language_sentiment_text]
-def sentiment_text(text):
-    """Detects sentiment in the text."""
     client = language.LanguageServiceClient()
 
     if isinstance(text, six.binary_type):
@@ -51,12 +52,17 @@ def sentiment_text(text):
     print('Score: {}'.format(sentiment.score))
     print('Magnitude: {}'.format(sentiment.magnitude))
     # [END language_python_migration_sentiment_text]
-# [END language_sentiment_text]
+    # [END language_sentiment_text]
+
+
+def sentiment_file():
+    # [START language_sentiment_gcs]
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
 
+    gcs_uri = 'gs://cloud-samples-data/language/hello.txt'
 
-# [START language_sentiment_gcs]
-def sentiment_file(gcs_uri):
-    """Detects sentiment in the file located in Google Cloud Storage."""
     client = language.LanguageServiceClient()
 
     # Instantiates a plain text document.
@@ -72,12 +78,18 @@ def sentiment_file(gcs_uri):
 
     print('Score: {}'.format(sentiment.score))
     print('Magnitude: {}'.format(sentiment.magnitude))
-# [END language_sentiment_gcs]
+    # [END language_sentiment_gcs]
+
+
+def entities_text():
+    # [START language_entities_text]
+    import six
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
 
+    text = 'President Kennedy spoke at the White House.'
 
-# [START language_entities_text]
-def entities_text(text):
-    """Detects entities in the text."""
     client = language.LanguageServiceClient()
 
     if isinstance(text, six.binary_type):
@@ -105,12 +117,17 @@ def entities_text(text):
         print(u'{:<16}: {}'.format('wikipedia_url',
               entity.metadata.get('wikipedia_url', '-')))
     # [END language_python_migration_entities_text]
-# [END language_entities_text]
+    # [END language_entities_text]
 
 
-# [START language_entities_gcs]
-def entities_file(gcs_uri):
-    """Detects entities in the file located in Google Cloud Storage."""
+def entities_file():
+    # [START language_entities_gcs]
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
+
+    gcs_uri = 'gs://cloud-samples-data/language/president.txt'
+
     client = language.LanguageServiceClient()
 
     # Instantiates a plain text document.
@@ -131,12 +148,18 @@ def entities_file(gcs_uri):
         print(u'{:<16}: {}'.format('salience', entity.salience))
         print(u'{:<16}: {}'.format('wikipedia_url',
               entity.metadata.get('wikipedia_url', '-')))
-# [END language_entities_gcs]
+    # [END language_entities_gcs]
+
 
+def syntax_text():
+    # [START language_syntax_text]
+    import six
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
+
+    text = 'President Kennedy spoke at the White House.'
 
-# [START language_syntax_text]
-def syntax_text(text):
-    """Detects syntax in the text."""
     client = language.LanguageServiceClient()
 
     if isinstance(text, six.binary_type):
@@ -157,12 +180,17 @@ def syntax_text(text):
         print(u'{}: {}'.format(part_of_speech_tag.name,
                                token.text.content))
     # [END language_python_migration_syntax_text]
-# [END language_syntax_text]
+    # [END language_syntax_text]
+
 
+def syntax_file():
+    # [START language_syntax_gcs]
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
+
+    gcs_uri = 'gs://cloud-samples-data/language/president.txt'
 
-# [START language_syntax_gcs]
-def syntax_file(gcs_uri):
-    """Detects syntax in the file located in Google Cloud Storage."""
     client = language.LanguageServiceClient()
 
     # Instantiates a plain text document.
@@ -178,12 +206,18 @@ def syntax_file(gcs_uri):
         part_of_speech_tag = enums.PartOfSpeech.Tag(token.part_of_speech.tag)
         print(u'{}: {}'.format(part_of_speech_tag.name,
                                token.text.content))
-# [END language_syntax_gcs]
+    # [END language_syntax_gcs]
+
+
+def entity_sentiment_text():
+    # [START language_entity_sentiment_text]
+    import six
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
 
+    text = 'President Kennedy spoke at the White House.'
 
-# [START language_entity_sentiment_text]
-def entity_sentiment_text(text):
-    """Detects entity sentiment in the provided text."""
     client = language.LanguageServiceClient()
 
     if isinstance(text, six.binary_type):
@@ -211,12 +245,17 @@ def entity_sentiment_text(text):
             print(u'  Type : {}'.format(mention.type))
         print(u'Salience: {}'.format(entity.salience))
         print(u'Sentiment: {}\n'.format(entity.sentiment))
-# [END language_entity_sentiment_text]
+    # [END language_entity_sentiment_text]
+
+
+def entity_sentiment_file():
+    # [START language_entity_sentiment_gcs]
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
 
+    gcs_uri = 'gs://cloud-samples-data/language/president.txt'
 
-# [START language_entity_sentiment_gcs]
-def entity_sentiment_file(gcs_uri):
-    """Detects entity sentiment in a Google Cloud Storage file."""
     client = language.LanguageServiceClient()
 
     document = types.Document(
@@ -240,12 +279,20 @@ def entity_sentiment_file(gcs_uri):
             print(u'  Type : {}'.format(mention.type))
         print(u'Salience: {}'.format(entity.salience))
         print(u'Sentiment: {}\n'.format(entity.sentiment))
-# [END language_entity_sentiment_gcs]
+    # [END language_entity_sentiment_gcs]
 
 
-# [START language_classify_text]
-def classify_text(text):
-    """Classifies content categories of the provided text."""
+def classify_text():
+    # [START language_classify_text]
+    import six
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
+
+    text = 'Android is a mobile operating system developed by Google, ' \
+           'based on the Linux kernel and designed primarily for ' \
+           'touchscreen mobile devices such as smartphones and tablets.'
+
     client = language.LanguageServiceClient()
 
     if isinstance(text, six.binary_type):
@@ -261,14 +308,17 @@ def classify_text(text):
         print(u'=' * 20)
         print(u'{:<16}: {}'.format('name', category.name))
         print(u'{:<16}: {}'.format('confidence', category.confidence))
-# [END language_classify_text]
+    # [END language_classify_text]
+
+
+def classify_file():
+    # [START language_classify_gcs]
+    from google.cloud import language
+    from google.cloud.language import enums
+    from google.cloud.language import types
 
+    gcs_uri = 'gs://cloud-samples-data/language/android.txt'
 
-# [START language_classify_gcs]
-def classify_file(gcs_uri):
-    """Classifies content categories of the text in a Google Cloud Storage
-    file.
-    """
     client = language.LanguageServiceClient()
 
     document = types.Document(
@@ -281,7 +331,7 @@ def classify_file(gcs_uri):
         print(u'=' * 20)
         print(u'{:<16}: {}'.format('name', category.name))
         print(u'{:<16}: {}'.format('confidence', category.confidence))
-# [END language_classify_gcs]
+    # [END language_classify_gcs]
 
 
 if __name__ == '__main__':
@@ -292,63 +342,53 @@ def classify_file(gcs_uri):
 
     classify_text_parser = subparsers.add_parser(
         'classify-text', help=classify_text.__doc__)
-    classify_text_parser.add_argument('text')
 
     classify_text_parser = subparsers.add_parser(
         'classify-file', help=classify_file.__doc__)
-    classify_text_parser.add_argument('gcs_uri')
 
     sentiment_entities_text_parser = subparsers.add_parser(
         'sentiment-entities-text', help=entity_sentiment_text.__doc__)
-    sentiment_entities_text_parser.add_argument('text')
 
     sentiment_entities_file_parser = subparsers.add_parser(
         'sentiment-entities-file', help=entity_sentiment_file.__doc__)
-    sentiment_entities_file_parser.add_argument('gcs_uri')
 
     sentiment_text_parser = subparsers.add_parser(
         'sentiment-text', help=sentiment_text.__doc__)
-    sentiment_text_parser.add_argument('text')
 
     sentiment_file_parser = subparsers.add_parser(
         'sentiment-file', help=sentiment_file.__doc__)
-    sentiment_file_parser.add_argument('gcs_uri')
 
     entities_text_parser = subparsers.add_parser(
         'entities-text', help=entities_text.__doc__)
-    entities_text_parser.add_argument('text')
 
     entities_file_parser = subparsers.add_parser(
         'entities-file', help=entities_file.__doc__)
-    entities_file_parser.add_argument('gcs_uri')
 
     syntax_text_parser = subparsers.add_parser(
         'syntax-text', help=syntax_text.__doc__)
-    syntax_text_parser.add_argument('text')
 
     syntax_file_parser = subparsers.add_parser(
         'syntax-file', help=syntax_file.__doc__)
-    syntax_file_parser.add_argument('gcs_uri')
 
     args = parser.parse_args()
 
     if args.command == 'sentiment-text':
-        sentiment_text(args.text)
+        sentiment_text()
     elif args.command == 'sentiment-file':
-        sentiment_file(args.gcs_uri)
+        sentiment_file()
     elif args.command == 'entities-text':
-        entities_text(args.text)
+        entities_text()
     elif args.command == 'entities-file':
-        entities_file(args.gcs_uri)
+        entities_file()
     elif args.command == 'syntax-text':
-        syntax_text(args.text)
+        syntax_text()
     elif args.command == 'syntax-file':
-        syntax_file(args.gcs_uri)
+        syntax_file()
     elif args.command == 'sentiment-entities-text':
-        entity_sentiment_text(args.text)
+        entity_sentiment_text()
     elif args.command == 'sentiment-entities-file':
-        entity_sentiment_file(args.gcs_uri)
+        entity_sentiment_file()
     elif args.command == 'classify-text':
-        classify_text(args.text)
+        classify_text()
     elif args.command == 'classify-file':
-        classify_file(args.gcs_uri)
+        classify_file()