title: Convert tuple to a string
body: <p>I know tuple to string questions were asked before but i dont really get it the way they explain it so I try to get an explanation on my example.
  So i need to convert the tuple points to a string to fill it in in the last line after 'got data'.
  This is the script:</p>
  
  <pre><code>def on_pick(self, event):
  
      print('On Pick!')
  
      thisline = event.artist
      xdata = thisline.get_xdata()
      ydata = thisline.get_ydata()
      ind = event.ind
      print(ind)
  
      points = tuple(zip(xdata[ind], ydata[ind]))
      print('onpick points:', points)
  
      QtGui.QMessageBox.information(self, "Click!", 'got data' + points)
  </code></pre>
  
  <p>the call is </p>
  
  <pre><code>self.canvas.mpl_connect('pick_event', self.on_pick)
  </code></pre>
  
  <p>and the output shoul be this as i already described it:</p>
  
  <pre><code>QtGui.QMessageBox.information(self, "Click!", 'got data' + points)
  </code></pre>
  
  <p>So where points is written in the last line i want to fill in the string of the tuple points.
  Im new to python so dont hate me :D</p>