Udpate Beta Vision samples to use beta tags [(#1640)](GoogleCloudPlatform/python-docs-samples#1640)

Author: alixhami

samples/snippets/detect/beta_snippets.py

@@ -33,7 +33,7 @@
 import io
 
 
-# [START vision_localize_objects]
+# [START vision_localize_objects_beta]
 def localize_objects(path):
     """Localize objects in the local image.
 
@@ -56,10 +56,10 @@ def localize_objects(path):
         print('Normalized bounding polygon vertices: ')
         for vertex in object_.bounding_poly.normalized_vertices:
             print(' - ({}, {})'.format(vertex.x, vertex.y))
-# [END vision_localize_objects]
+# [END vision_localize_objects_beta]
 
 
-# [START vision_localize_objects_gcs]
+# [START vision_localize_objects_gcs_beta]
 def localize_objects_uri(uri):
     """Localize objects in the image on Google Cloud Storage
 
@@ -81,10 +81,10 @@ def localize_objects_uri(uri):
         print('Normalized bounding polygon vertices: ')
         for vertex in object_.bounding_poly.normalized_vertices:
             print(' - ({}, {})'.format(vertex.x, vertex.y))
-# [END vision_localize_objects_gcs]
+# [END vision_localize_objects_gcs_beta]
 
 
-# [START vision_handwritten_ocr]
+# [START vision_handwritten_ocr_beta]
 def detect_handwritten_ocr(path):
     """Detects handwritten characters in a local image.
 
@@ -127,10 +127,10 @@ def detect_handwritten_ocr(path):
                     for symbol in word.symbols:
                         print('\tSymbol: {} (confidence: {})'.format(
                             symbol.text, symbol.confidence))
-# [END vision_handwritten_ocr]
+# [END vision_handwritten_ocr_beta]
 
 
-# [START vision_handwritten_ocr_gcs]
+# [START vision_handwritten_ocr_gcs_beta]
 def detect_handwritten_ocr_uri(uri):
     """Detects handwritten characters in the file located in Google Cloud
     Storage.
@@ -171,7 +171,7 @@ def detect_handwritten_ocr_uri(uri):
                     for symbol in word.symbols:
                         print('\tSymbol: {} (confidence: {})'.format(
                             symbol.text, symbol.confidence))
-# [END vision_handwritten_ocr_gcs]
+# [END vision_handwritten_ocr_gcs_beta]
 
 
 if __name__ == '__main__':