Make sure that the mount point exits and use absolute path for the mount point, if the mount point "mzpine" is not in the current location.

To begin with you may use the default python IDLE or Eclipse with pydev plugin. Also you may check "SPE IDE".

If you are using Ubuntu, you may use "Firestarter" as firewall and allow your fiends connection.

The atlernative way to transfer the scanned textbook files securley is using SFTP server. Try to setup the SFTP server so that your friend can push the files to your system.