I'm failed to create openstack network

Question

I failed to excute this command openstack network create --share --external --availability-zone-hint nova --provider-physical-network provider --provider-network-type flat public It will display the message that include ascii app.py 406 line. We can only remove the compute and build a new one when me see it. I have configurated the keystone,glance,nova,mysql,rabbitmq and the compute node.

First,I tried to reboot the virtual machine,but failed. And then,I tried to edit the app.py and write the decode code,Failed again.