pexpect is a must have. It will not work without it. But you could have it installed for another package.

ussdquery.py is not able to block pop up boxes with ussd replies. So it is enough to send queries and receive replies, but it is absolutely unusable without other utilites.

P.S. NEWER copy files to your system or manually install programs (without package manager). You would just turn your system in-to trash. This is not a unix way.