Calculate splitting (sparky script)

From NMR Wiki

import string
import noesy
import pyutil
import sputil
import tkutil
 
def show_dialog(session):
   tk = session.tk
   window = Tkinter.Toplevel(tk)
   view = session.selected_view()
   spectrum = view.spectrum
   peaks = spectrum.selected_peaks()
   num_peaks = len(peaks)
   #make sure that num_peaks is 2, if it is not 2 print some error message

   if num_peaks != 2:
       message = 'Select two peaks!'
   else:
       p1 = peaks[0]
       p2 = peaks[1]
       dim = len(p1.position)
       message = 

       lbl = ('Delta W1:','Delta W2:','Delta W3:')
       for i in range(dim):
       #x y z must correspond to actual xyz (axis order!)
       #print hertz instead of ppms
           ppm = spectrum.hz_per_ppm[i]
           delta = abs(p1.position[i] - p2.position[i])*ppm
           delta = '%.2f' % delta
           message = message + lbl[i] + str(delta) + '\n'
   lbl = Tkinter.Label(window,text=message)
   lbl.pack()

   btn = Tkinter.Button(window,text='ok')
   btn.pack()