simple_ui_firewall.py example unnecessarily imports EthAddr from pox.library.addresses

[thiagolckurovski]

The simple_ui_firewall.py example imports EthAddr from pox.library.addresses. That is not a problem in itself, but since Pyretic has an EthAddr object of its own and simple_ui_firewall.py doesn't actually uses any EthAddr, it's quite confusing for newcomers. Just removing the import would fix this problem.

[SdnRK]

I am not able to execute any Pyretic file other than pyretic.py

Can you suggest me way of execution simple_ui_firewall.py?