[Tkinter] Tkinter window pop up again when i click button

[joe_momma]

worked for me with the callServer function commented.
I'm using linux, 3.5 idle
Did you run from console? or pycharm only?
I did notice a problem, when you get the port entry widget it's returning a string and port needs to be converted to integer. (int(PORT)) then the web server threw an error asking for permission.