[PyQt] Show QDialog and execute code after

[Starglider Developer]

Thank you for your answers.

I making an update app that shows a QTextEdit object and starts (should)
start to get information from the system before
ask the user what to do, it does that but if now but only after the
function get all the system info and the it draws the QDialog.

It's something like a Debian apt-get where the terminal is showing  what is
appending before and after each operation.
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