Python + Wand.Image - saving output images to AWS with sequential pagenumber.jpg names

Question

I am working on a script that would Convert a PDF from the internet (without saving it to disk) to a series of jpegs, then save the JPGs to AWS s3.

Unfortunately, the code below only saves the first page of the PDF as JPG to AWS. Any ideas on how I can modify it to save images to AWS with sequential file names?

from urllib2 import urlopen
from wand.image import Image
from io import BytesIO
import boto3
    s3 = boto3.client(
        's3',
        aws_access_key_id='mykey',
        aws_secret_access_key='mykey'
    )

    bucket_name = 'testbucketAWS323'
    #location on disk

    #file prefix
test_id = 'example'
f = urlopen("https://s3.us-east-2.amazonaws.com/converted1jpgs/example.pdf")
bytes_io_file = BytesIO()
with Image(file=f) as img:
    print('pages = ', len(img.sequence))
    with img.convert('png') as converted:
        bytes_io_file = BytesIO(converted.make_blob('jpeg'))
      #code below should take 'converted' object, and save it to AWS as jpg. 
        s3.upload_fileobj(bytes_io_file, bucket_name, "assssd.jpg")
        print 'done'

Answer 1

Just enumerate over the document pages ( wand.image.Image.sequence ) to get the page number & resource. With the page resource copied to a new instance of Image , export blob directly, and don't worry about intermediate conversions.

from urllib2 import urlopen
from wand.image import Image
from io import BytesIO
import boto3

# ....

url = 'https://s3.us-east-2.amazonaws.com/converted1jpgs/example.pdf'
resource = urlopen(url)
with Image(file=resource) as document:
    for page_number, page in enumerate(document.sequence):
        with Image(page) as img:
            bytes_io_file = BytesIO(img.make_blob('JPEG'))
            filename = 'output_{0}.jpg'.format(page_number)
            s3.upload_fileobj(bytes_io_file, bucket_name, filename)

Answer 2

在转换时使用upload_fileobj方法怎么样？