Got an import error on macos system

[wzcprince]

ErrorMessge:

[blue@teddymac ufm_pkeys 17:02:34]$ python3 ufm_pkeys.py --get_pkeys
Error occurred while importing python modules, Please make sure that you exported your repository to PYTHONPATH by running: export PYTHONPATH="${PYTHONPATH}:/Users/blue/code_hpc/ufm_sdk_3.0"

[wzcprince]

on macos system, it may be to install jsonschema lib beforehand, I have already fixed the issue locally and done the verification.
The root cause of the problem is the code "from jsonschema.exceptions import ValidationError" in commit dfbdc65 of merge #47 without adding the jsonschema to requirements.txt