def lemma(self, verb, parse=True):
if dict.__len__(self) == <NUM_LIT:0>:<EOL><INDENT>self.load()<EOL><DEDENT>if verb.lower() in self._inverse:<EOL><INDENT>return self._inverse[verb.lower()]<EOL><DEDENT>if verb in self._inverse:<EOL><INDENT>return self._inverse[verb]<EOL><DEDENT>if parse is True: <EOL><INDENT>return self.find_lemma(verb)<EOL><DEDENT>
Returns the infinitive form of the given verb, or None.