code: def t_doublequote(self, t):
          r'"'
          t.lexer.string_start = t.lexer.lexpos
          t.lexer.string_value = ''
          t.lexer.push_state('doublequote'f t_doublequote(self, t):
          r'"'
          t.lexer.string_start = t.lexer.lexpos
          t.lexer.string_value = ''
          t.lexer.push_state('doublequote')
docs: r'"