def loads(self, requirements_text):
        lines = re.findall(Requirement.spec_regex,
                           requirements_text,
                           re.MULTILINE)
        for line in lines:
            self.add(Requirement(line[0], "".join(line[1:])))
def get_bind(self, mapper=None, *args, **kwargs):
                    return super(MySession, self).get_bind(
                        mapper, *args, **kwargs
                    )