def safe_run_module(self, mod_name, where):
        """A safe version of runpy.run_module().

        This version will never throw an exception, but instead print
        helpful error messages to the screen.

        Parameters
        ----------
        mod_name : string
            The name of the module to be executed.
        where : dict
            The globals namespace.
        """
        try:
            where.update(
                runpy.run_module(str(mod_name), run_name="__main__",
                                 alter_sys=True)
                )
        except:
            self.showtraceback()
            warn('Unknown failure executing module: <%s>' % mod_name)