environment/lib/python2.7/site-packages/IPython/core/history.py
def reset(self, new_session=True):
        """Clear the session history, releasing all object references, and
        optionally open a new session."""
        self.output_hist.clear()
        # The directory history can't be completely empty
        self.dir_hist[:] = [os.getcwdu()]
        
        if new_session:
            if self.session_number:
                self.end_session()
            self.input_hist_parsed[:] = [""]
            self.input_hist_raw[:] = [""]
            self.new_session()
def reset(self, new_session=True):
        """Clear the session history, releasing all object references, and
        optionally open a new session."""
        self.output_hist.clear()
        # The directory history can't be completely empty
        self.dir_hist[:] = [os.getcwdu()]
        
        if new_session:
            if self.session_number:
                self.end_session()
            self.input_hist_parsed[:] = [""]
            self.input_hist_raw[:] = [""]
            self.new_session()
Clear the session history, releasing all object references, and
        optionally open a new session.