Neato! Extract a .tar.gz from a .tar, and read the file content, all in memory

extract_tar.py

import sys
import tarfile

input_tar = sys.argv[1]

tar = tarfile.open(input_tar, 'r')
for member in tar:
   print("Extracting %s" % member.name)
   subtar = tarfile.open(mode='r|gz', fileobj=tar.extractfile(member))
   for submember in subtar:
        print("Found %s!" % submember.name)