small python script

Hi I am looking for small python script which will perform following 1) Download a zip file and then unzip the file 2) perform the md5 checksum and count the files in each directory and keep track of it. 3) Then script compares it with similar directory structure and make sure md5 values match 4) when there is no match or the count of the files increases the unzip count, sends an email. 5) script also check the permission of the files in the directory structure mention in step # 3. If there is an incorrect permission script reports that in an email.