docs: def _input_as_multifile(self, data):
          """For use with the -profile option
  
          This input handler expects data to be a tuple containing two
          filenames. Index 0 will be set to -in1 and index 1 to -in2
          """
          if data:
              try:
                  filename1, filename2 = data
              except:
                  raise ValueError, "Expected two filenames"
  
              self.Parameters['-in'].off()
              self.Parameters['-in1'].on(filename1)
              self.Parameters['-in2'].on(filename2)
          return ''