title: How to display error occurred in script?
body: <p>I think my question is already asked, but I didn't find any topic about that.
  When I try somme script with kivy, I have sometimes errors (such as undeclared variable, bad indentation...), but Qpython don't display them.
  I lunch kivy with:
  "#qpy:kivy"
  and consequently, there is no console. A log is however present, but it's empty.
  Is there a way to remedy this ?
  Should I add a line to display error ?</p>
  
  <p>Thanks</p>
  
  <p>Simon</p>
  
  <p>PS: The "print" command is also useful, but not working (no console). I think it's the same problem.</p>