code: def compute_gzip_md5(file_name):
      
      md5 = hashlib.md5()
      file_obj = gzip.open(file_name, 'rb')
      for chunk in iter(lambda: file_obj.read(8192), ''):
          md5.update(chunk)
  
      file_obj.close()
      return md5.hexdigest()
docs: method traverses compressed file and calculates its MD5 checksum