i got this msg,why ??????
what shoud i do???

from .ffi import (
File "/usr/local/lib/python3.6/dist-packages/rocketmq_client_python-0.5.0rc3-py3.6.egg/rocketmq/ffi.py", line 40, in
raise ImportError('rocketmq dynamic library not found')
ImportError: rocketmq dynamic library not found