Hi all,
    I met a problem of ryu installation through pip install ryu. The message 
shows below:






(container)root@muzi-OptiPlex-390:/home/muzi/python/container# pip install ryu
Downloading/unpacking ryu
  Downloading ryu-3.20.2.tar.gz (1.2MB): 1.2MB downloaded
  Running setup.py egg_info for package ryu
    
    Installed /home/muzi/python/container/build/ryu/pbr-0.11.0-py2.7.egg
    [pbr] Processing SOURCES.txt
    warning: LocalManifestMaker: standard file '-c' not found
    
    warning: no previously-included files found matching '.gitignore'
    warning: no previously-included files found matching '.gitreview'
    warning: no previously-included files matching '*.pyc' found anywhere in 
distribution
    warning: no previously-included files matching '*' found under directory 
'doc/build'
    warning: no previously-included files matching '*' found under directory 
'ryu/tests/packet_data_generator'
    warning: no previously-included files matching '*~' found anywhere in 
distribution
    warning: no previously-included files matching '*.pyc' found anywhere in 
distribution
    warning: no previously-included files matching '.gitignore' found anywhere 
in distribution
Downloading/unpacking eventlet (from ryu)
  Downloading eventlet-0.17.4.tar.gz (284kB): 284kB downloaded
  Running setup.py egg_info for package eventlet
    Traceback (most recent call last):
      File "app_main.py", line 51, in run_toplevel
      File "app_main.py", line 534, in run_it
      File "<string>", line 16, in <module>
      File "/home/muzi/python/container/build/eventlet/setup.py", line 3, in 
<module>
        from eventlet import __version__
      File "eventlet/__init__.py", line 5, in <module>
        from eventlet import greenthread
      File "eventlet/greenthread.py", line 4, in <module>
        from eventlet import event
      File "eventlet/event.py", line 3, in <module>
        from eventlet import hubs
      File "eventlet/hubs/__init__.py", line 3, in <module>
        from eventlet import patcher
      File "eventlet/patcher.py", line 4, in <module>
        from eventlet.support import six
      File "eventlet/support/__init__.py", line 4, in <module>
        from eventlet.support import greenlets, six
      File "eventlet/support/greenlets.py", line 6, in <module>
        preserves_excinfo = 
(distutils.version.LooseVersion(greenlet.__version__)
    AttributeError: 'module' object has no attribute '__version__'
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):


  File "app_main.py", line 51, in run_toplevel


  File "app_main.py", line 534, in run_it


  File "<string>", line 16, in <module>


  File "/home/muzi/python/container/build/eventlet/setup.py", line 3, in 
<module>


    from eventlet import __version__


  File "eventlet/__init__.py", line 5, in <module>


    from eventlet import greenthread


  File "eventlet/greenthread.py", line 4, in <module>


    from eventlet import event


  File "eventlet/event.py", line 3, in <module>


    from eventlet import hubs


  File "eventlet/hubs/__init__.py", line 3, in <module>


    from eventlet import patcher


  File "eventlet/patcher.py", line 4, in <module>


    from eventlet.support import six


  File "eventlet/support/__init__.py", line 4, in <module>


    from eventlet.support import greenlets, six


  File "eventlet/support/greenlets.py", line 6, in <module>


    preserves_excinfo = (distutils.version.LooseVersion(greenlet.__version__)


AttributeError: 'module' object has no attribute '__version__'


----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in 
/home/muzi/python/container/build/eventlet



I am looking forward to your reply.Thank you.


Best regards.




------------------
Li Cheng ????_____________________________________________________
School of Information and Communication Engineering
Beijing University of Posts and Telecommunications
Beijing 100876, PR China

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