Python unzipping stream of bytes?

Question

Here is the situation:

• I get gzipped xml documents from Amazon S3

  import boto
  from boto.s3.connection import S3Connection
  from boto.s3.key i         
  
  
          

Answer 1

For Python3x and boto3-

So I used BytesIO to read the compressed file into a buffer object, then I used zipfile to open the decompressed stream as uncompressed data and I was able to get the datum line by line.

import io
import zipfile
import boto3
import sys

s3 = boto3.resource('s3', 'us-east-1')


def stream_zip_file():
    count = 0
    obj = s3.Object(
        bucket_name='MonkeyBusiness',
        key='/Daily/Business/Banana/{current-date}/banana.zip'
    )
    buffer = io.BytesIO(obj.get()["Body"].read())
    print (buffer)
    z = zipfile.ZipFile(buffer)
    foo2 = z.open(z.infolist()[0])
    print(sys.getsizeof(foo2))
    line_counter = 0
    for _ in foo2:
        line_counter += 1
    print (line_counter)
    z.close()


if __name__ == '__main__':
    stream_zip_file()