Hi,

I am a beginner with SDN and ryu. In order to develop an SDN app, i was
following the tutorial from
https://github.com/osrg/ryu/wiki/OpenFlow_Tutorial, to start with.

While trying to run 'PYTHONPATH=. ./bin/ryu-manager
ryu/app/simple_switch.py' from xterm controller window, I am getting the
following


Traceback (most recent call last):
  File "/usr/local/bin/ryu-manager", line 9, in <module>
    load_entry_point('ryu==3.2', 'console_scripts', 'ryu-manager')()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 343, in
load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2307, in
load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2013, in
load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/home/ryu/ryu/ryu/cmd/manager.py", line 43, in <module>
    from ryu.topology import switches
  File "/home/ryu/ryu/ryu/topology/switches.py", line 32, in <module>
    from ryu.lib.packet import packet, ethernet, lldp
  File "/home/ryu/ryu/ryu/lib/packet/__init__.py", line 6, in <module>
    from . import (ethernet, arp, icmp, icmpv6, ipv4, ipv6, lldp, mpls,
packet,
  File "/home/ryu/ryu/ryu/lib/packet/ethernet.py", line 17, in <module>
    from . import packet_base
  File "/home/ryu/ryu/ryu/lib/packet/packet_base.py", line 21, in <module>
    @six.add_metaclass(abc.ABCMeta)
AttributeError: 'module' object has no attribute 'add_metaclass'

Google search recommended to install six, that I did, but it's still the
same.

Any workaround?

Thanks,
Shailvi
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