Hi there,
If you have a RyuApp and put it in a python file that happens to have the
same name as any python module installed in PYTHON_PATH, ryu-manager will
be unable to load the RyuApp.
Here is an example showing the issue in ryu-manager 4.12:
brad@zilch ~/D/r/r/app> ryu-manager ./simple_switch_13.py
loading app ./simple_switch_13.py
loading app ryu.controller.ofp_handler
instantiating app ./simple_switch_13.py of SimpleSwitch13
instantiating app ryu.controller.ofp_handler of OFPHandler
[loads fine]
brad@zilch ~/D/r/r/app> pip freeze | grep six
six==1.10.0
[find name of any package installed with pip]
brad@zilch ~/D/r/r/app> mv ./simple_switch_14.py ./six.py
brad@zilch ~/D/r/r/app> ryu-manager ./six.py
loading app ./six.py
[ryu-manager will attempt to load a RyuApp from
/usr/lib/python2.7/dist-packages/six.py instead of ./six.py]
This seems to be an issue in ryu
<https://github.com/osrg/ryu/tree/master/ryu>/*utils.py* where import_module()
will prefer to load a python module even when presented with a relative or
absolute file path.
Interested on people's thoughts on the best way to solve this one.
Regards,
Brad
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