<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _generate_and_store_mold_id_map(self, template_map, molds):
 """ Not a pure generator expression as this has the side effect of storing the resulting id and map it into a local dict. Produces a list of all valid mold_ids from the input template_keys. Internal function; NOT meant to be used outside of this class. """


        name = self.req_tmpl_name
        for key in sorted(template_map.keys(), reverse=True):
            if len(key.split('/')) == 3 and key.endswith(name):
                mold_id = key[len(self.text_prefix):-len(name) - 1]
                molds[mold_id] = template_map[key][:-len(name) - 1]
                yield mold_id