Hello everyone, I am new to python and trying to run an example code from mininet tests. Basically, I am trying to call a method in Hcontroller.py from base class Routing defined in DCRouting.py which runs and fetches all the required results in install_reactive_path() method, but it returns None when it is called from _GlobalFirstFit. I hope someone here could help me fix this bug.. I am attaching all the three files(DCRouting.py, HController.py, util.py) to have a look into. Thanks in advance for your time, help or suggestion. Thanks a lot! kind regards, David -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.python.org/pipermail/python-list/attachments/20150509/df507503/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: DCRouting.py Type: text/x-python Size: 3821 bytes Desc: not available URL: <http://mail.python.org/pipermail/python-list/attachments/20150509/df507503/attachment.py> -------------- next part -------------- A non-text attachment was scrubbed... Name: DCTopo.py Type: text/x-python Size: 5835 bytes Desc: not available URL: <http://mail.python.org/pipermail/python-list/attachments/20150509/df507503/attachment-0001.py> -------------- next part -------------- A non-text attachment was scrubbed... Name: DemandEstimation.py Type: text/x-python Size: 3288 bytes Desc: not available URL: <http://mail.python.org/pipermail/python-list/attachments/20150509/df507503/attachment-0002.py> -------------- next part -------------- A non-text attachment was scrubbed... Name: HController.py Type: text/x-python Size: 14245 bytes Desc: not available URL: <http://mail.python.org/pipermail/python-list/attachments/20150509/df507503/attachment-0003.py> -------------- next part -------------- A non-text attachment was scrubbed... Name: util.py Type: text/x-python Size: 387 bytes Desc: not available URL: <http://mail.python.org/pipermail/python-list/attachments/20150509/df507503/attachment-0004.py>