To write a program in PyQT

hi all
You need to write a simple multithreaded program

What the program should have the functions:
1. Start – to start the delivery via smtp to multi-threaded mode (to send emails to our smtp exim)
2. Stop – terminates all threads
And a couple of functions by pressing the buttons – should run in parallel.

Waiting for the price offer
If there is an alternative to PyQt is also waiting for proposals

Thank you