def load(self, filename, create_if_missing=True):
        filename = Path(filename)
        if not filename.exists() and create_if_missing:
            self.load_pip_requirements()
            with filename.open("w") as f:
                f.write(yaml.dump(self.serialized, default_flow_style=False,
                                  encoding=None))
            self.filename = filename
            return self.save(filename)
        with filename.open() as f:
            for group, requirements in yaml.load(f.read()).items():
                for requirement in requirements:
                    self[group].add(Requirement.coerce(requirement))
        self.filename = filename
def _wait_for_license_pool_state_to_activate(self, pool):
        error_values = ['EXPIRED', 'FAILED']
        # Wait no more than 5 minutes
        for x in range(1, 30):
            pool.refresh()
            if pool.state == 'LICENSED':
                return True
            elif pool.state == 'WAITING_FOR_EULA_ACCEPTANCE':
                pool.modify(
                    eulaText=pool.eulaText,
                    state='ACCEPTED_EULA'
                )
            elif pool.state in error_values:
                raise F5ModuleError(pool.errorText)
            time.sleep(10)