'Return string representation.'

def __repr__(self):

    s = ('<DigMontage    |    %d    extras    (headshape),    %d    HPIs,    %d    fiducials,    %d    channels>' % ((len(self.hsp) if (self.hsp is not None) else 0), (len(self.point_names) if (self.point_names is not None) else 0), sum(((x is not None) for x in (self.lpa, self.rpa, self.nasion))), (len(self.dig_ch_pos) if (self.dig_ch_pos is not None) else 0)))
    return s
