environment/lib/python2.7/site-packages/IPython/core/prefilter.py
def register_transformer(self, transformer):
        """Register a transformer instance."""
        if transformer not in self._transformers:
            self._transformers.append(transformer)
            self.sort_transformers()
def register_transformer(self, transformer):
        """Register a transformer instance."""
        if transformer not in self._transformers:
            self._transformers.append(transformer)
            self.sort_transformers()
Register a transformer instance.