code: def showBeamlines(self):
          
          cnt = 0
          blidlist = []
          for k in self.all_elements:
              try:
                  if 'beamline' in self.all_elements.get(k):
                      cnt += 1
                      blidlist.append(k)
              except:
                  pass
          retstr = '{total:<3d}beamlines: {allbl}'.format(total=cnt,
                                                          allbl=';'.join(blidlist))
          return retstr
docs: show all defined beamlines