gistfile1.txt

# the endpoint of the api
ENDPOINT_URL = 'https://vision.googleapis.com/v1p1beta1/images:annotate'
# the api key
os.environ['GOOGLE_APPLICATION_CREDENTIALS']='your/path/to/credentials.json'
# init api client
client = vision.ImageAnnotatorClient()

with io.open(YOUR_IMAGE_PATH, 'rb') as f:
        content = f.read()
image = vision.types.Image(content=content)    
image_context = vision.types.ImageContext(language_hints=['zh-TW'])

response = client.document_text_detection(image=image,image_context=image_context)