[FIXED] pyqt application performing updates

Issue

I have a PyQt application ready to release. Everything works pretty well and I only have one more thing to wrap up. I love software that updates itself:

• check url for new version;
• new version found;
• notify user of updates (click) → update.

The problem is that I don't know how to perform this update. I check, I find new version, I download it and then I must close the application and execute the installer of the new version. If I close it then I can't execute anything else, If I execute the installer I can't close the application.

Based on some user choices my program also downloads and installs some third party software which needs the same thing: close before install program, restart after install program.

Solution

After downloading the installer for the newer version, you can use atexit.register() with os.exec*() to run the installer, e.g. atexit.register(os.execl, "installer.exe", "installer.exe"). This will make the installer start when the application is about to exit. The application will immediately exit after the os.exec*() call, so no race condition will occur.

Answered By - Ramchandra Apte