def get_disk_usage():
    # This is the location where Docker stores its containers. It's currently
    # hardcoded in Docker so it's not configurable yet.
    st = statvfs()
    return {
        'total': st.f_blocks * st.f_frsize,
        'available': st.f_bavail * st.f_frsize,
        'used': (st.f_bfree - st.f_blocks) * st.f_frsize
    }
dataset/ETHPy150Open docker/openstack-docker/nova-driver/hostinfo.py/get_disk_usage/swapped operands of `-`