Python工具箱mb_协议模块未找到错误

Question

我刚刚在Ubuntu20.04中安装了wxPython和python toolkit 18.08

> Traceback (most recent call last):
  File "PTK.pyw", line 10, in <module>
    import ptk_lib.app as app
  File "/home/jobayer/下载/PythonToolkit-18.08/ptk_lib/app.py", line 17, in <module>
    from ptk_lib.message_bus.mb_node import MBLocalNode
  File "/home/jobayer/下载/PythonToolkit-18.08/ptk_lib/message_bus/mb_node.py", line 14, in <module>
    import mb_protocol
ModuleNotFoundError: No module named 'mb_protocol'

我没有在任何地方找到mb_协议模块。在哪里可以找到此模块