title: How to get console output printed using kivy
body: <p>I have been trying to learn how to use Kivy python and I would like to 
  Know how to interact with the Os console/terminal to run commands and 
  receive results. The tutorials I have seen so far only show how to create
  widgets,buttons,etc
    For example how do You get the result from running the command "uname"
  displayed in kivy. With such code below. using "on press". How can I let it interact with the OS run a command and display it back in the kivy app. Is there any tutorial on creating desktop apps/utilities </p>
  
  <pre><code>    from kivy.app import App
      from kivy.uix.button import Button
  
      class tutap(App):
          def build(self):
              return Button(text="Press here")
  
      tutap().run()
  </code></pre>
  
  <p>Update:
      Here is example of what Im trying to achieve.This uses the easygui module:</p>
  
  <pre><code>    import subprocess
      from easygui import *
      msg= "what you want"
      out = subprocess.check_output("uname -a",shell=True)
      title = "My choice"
      choices=["kernel version","nothing"]
      choice=boolbox(msg,title,choices)
      if choice==1:
          msgbox(out)
      elif choice==0:
          msgbox("The End")
  </code></pre>