vision-api-image-attibutes.py

  #open a img-file
  with open(photo_file, 'rb') as image:
    image_content = base64.b64encode(image.read())
    service_request = service.images().annotate(
      body={
        'requests': [{
          'image': {
            'content': image_content
           },
          'features': [{
            'type': 'IMAGE_PROPERTIES', #type of detection
            'maxResults': 1,
           }]
         }]
      })
    response = service_request.execute() #service request
    color = response['responses'][0]['imagePropertiesAnnotation']['dominantColors']['colors'][0] #information of the response
    print('Color: %s para %s' % (color, photo_file)) #print the info
    return 0