整体目录结构

|-- comm | |-- prim_joint_set.py | |-- prim_position_set.py |-- app | |-- entity | | |-- init.py | |-- http_srv.py

app.entity.__init__py

import sys
import os
current_dir = os.path.dirname(os.path.abspath(__file__))
sys.path.append(f'{current_dir}/../../comm')

from prim_position_set import PrimPositionSet
from prim_joint_set import PrimJointSet

app.http_srv.py

from entity import PrimJointSet