fix test

samples/snippets/detect/detect.py

@@ -805,6 +805,7 @@ def detect_document_uri(uri):
 # [START vision_text_detection_pdf_gcs]
 def async_detect_document(gcs_source_uri, gcs_destination_uri):
     """OCR with PDF/TIFF as source files on GCS"""
+    import json
     import re
     from google.cloud import vision
     from google.cloud import storage
@@ -860,20 +861,18 @@ def async_detect_document(gcs_source_uri, gcs_destination_uri):
     output = blob_list[0]
 
     json_string = output.download_as_string()
-    print("====sijun detect.py: 863")
-    print(json_string)
-    response = vision.AnnotateFileResponse.from_json(json_string)
+    response = json.loads(json_string)
 
     # The actual response for the first page of the input file.
-    first_page_response = response.responses[0]
-    annotation = first_page_response.full_text_annotation
+    first_page_response = response['responses'][0]
+    annotation = first_page_response['fullTextAnnotation']
 
     # Here we print the full text from the first page.
     # The response contains more information:
     # annotation/pages/blocks/paragraphs/words/symbols
     # including confidence scores and bounding boxes
-    print(u'Full text:\n{}'.format(
-        annotation.text))
+    print('Full text:\n')
+    print(annotation['text'])
 # [END vision_text_detection_pdf_gcs]