I had downloaded ryu 3.6ova image, and do some necessary action according the direction on openflow tutorial. include : time sudo apt-get install python-eventlet python-routes python-webob python-paramiko git pull so i'm sure my ryu enviroment should be OK. then i start the ryu controller PYTHONPATH=. ./bin/ryu-manager ryu/app/simple_switch.py and start mininet sudo mn --topo single,3 --mac --switch ovsk --controller remote till now , everything seems fine, and i can set up flows in ovs. but when i want to use topology view, i met some problem, i use the command PYTHONPATH=. ./bin/ryu run --observe-links ryu/app/gui_topology/gui_topology.py but it seems not work well. please see the dump info: loading app ryu/app/gui_topology/gui_topology.py Traceback (most recent call last): File "./bin/ryu", line 20, in <module> main() File "/home/ryu/ryu/ryu/cmd/ryu_base.py", line 75, in main subcmd.run(base_conf.subcommand_args) File "/home/ryu/ryu/ryu/cmd/ryu_base.py", line 58, in run self.entry(args=args, prog=prog) File "/home/ryu/ryu/ryu/cmd/manager.py", line 78, in main app_mgr.load_apps(app_lists) File "/home/ryu/ryu/ryu/base/app_manager.py", line 385, in load_apps cls = self.load_app(app_cls_name) File "/home/ryu/ryu/ryu/base/app_manager.py", line 361, in load_app mod = utils.import_module(name) File "/home/ryu/ryu/ryu/utils.py", line 86, in import_module __import__(name) File "/home/ryu/ryu/ryu/app/gui_topology/gui_topology.py", line 31, in <module> from webob.static import DirectoryApp ImportError: No module named static would you please tell me how to solve it, thanks a lot
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