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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def uninstall(self):
 """Uninstall this importer if possible and un-import any modules imported by it."""

    if not self._uninstallable:
      _tracer().log('Not uninstalling {}'.format(self), V=9)
      return

    if self in sys.meta_path:
      sys.meta_path.remove(self)
      maybe_exposed = frozenset(os.path.join(self._root, importable.path)
                                for importable in self._importables)
      sys.path[:] = [path_item for path_item in sys.path if path_item not in maybe_exposed]
      for loader in self._loaders:
        loader.unload()
      _tracer().log('Uninstalled {}'.format(self), V=3)