Rewrite small program into Python

Attached with this post is a working program. And I want you to rewrite this program (345 lines of code) to Python. A part of GUI of the program (resulting in 309 lines of Python code) has already been converted into Python and is working. You have to rewrite the rest of the code and get the whole program to run in Python. In order to get our working program to run, you need to follow the instructions written in [login to view URL] file. The main program (sales [login to view URL]) contains 345 lines of code. The working Python file ([login to view URL]) contains 309 lines of code. Since the GUI part has been done, you have to focus on implementation of the program. I want an exe file of the code. This EXE file should not require the installation of any program in order to run, nor should the EXE file write anything to the registry. Everything should work by clicking that exe file. You may, though, include dll, ini and similar files with your solution. The Python code should run under Windows. The Python version should be 2.7. Your program should generally not use more than 1% of CPU, though occational peaks are alrights.