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 setUp(self):
        self.credentials = {
            'username': 'testuser',
            'password': 'test1234',
            'email': 'test@mail.com'}

        # Create a test Group
        my_group, created = Group.objects.get_or_create(name='test_group')

        # Add user to test Group
        User.objects.get(pk=1).groups.add(my_group)