def _show_extensions(self):
        for mn in ('_rl_accel','_renderPM','sgmlop','pyRXP','pyRXPU','_imaging','Image'):
            try:
                A = [mn].append
                __import__(mn)
                m = sys.modules[mn]
                A(m.__file__)
                for vn in ('__version__','VERSION','_version','version'):
                    if hasattr(m,vn):
                        A('%s=%r' % (vn,getattr(m,vn)))
            except:
                A('not found')
            self._writeln(' '+' '.join(A.__self__))