ctx-test.py

def lock(res):
    pass


def free(res):
    pass


class MyCtx(object):
    __slots__ = ('res',)

    def __init__(self, res):
        self.res = res

    def __enter__(self):
        lock(self.res)
        return self.res

    def __exit__(self, clazz, ex, tb):
        free(self.res)
        if not 'no-suppress':
            return True


if __name__ == '__main__':
    with MyCtx('World') as it, MyCtx('Anybody') as anybody:
        print(f"Hello, {it} !")
        print(f"Hello, {anybody} !")