Multiple frames in Tkinter while using Python

This is probably not the answer you are looking for, but I can make it do the right thing by getting rid of the class. Here is what I have:

from tkinter import *import osroot = Tk()def buttonPressed():    # this is the problem in the program.    # it keeps returning [''] in the print statement and doesn't quit    # any applications    listOfApps = form.get().split(',')    # the print is just so i can see the output    print(listOfApps)    # goes through each item in list and kills them(yes i know there are much easier    # ways to do this, i'm just trying to learn a bit about GUI and the os module    for i in listOfApps:        try:            os.system("killall " + i)        except:            passdef buttonPressed2():    filesToOpen = form2.get().split(', ')    for i in filesToOpen:        try:            os.system("open " + i)        except:            passcontainer = Frame(root)form = Entry(container)button = Button(container)root['background'] = 'red'container['background'] = 'red'button['text'] = 'kill matching processes'button['command'] = buttonPressedform['background'] = 'red'form['border'] = '5'form['highlightthickness'] = '0'container2 = Frame(root)form2 = Entry(container2)button2 = Button(container2)root['background'] = 'blue'container2['background'] = 'blue'button2['text'] = 'Open desired files'button2['command'] = buttonPressed2form2['background'] = 'blue'form2['border'] = '5'form2['highlightthickness'] = '0'container.pack()form.pack()button.pack()container2.pack()form2.pack()button2.pack()#starts up windowroot.mainloop()