problems to install openerp-web 6.0.1

I have received the folowing error:

Traceback (most recent call last):
  File "/usr/local/bin/openerp-web", line 5, in <module>
    pkg_resources.run_script('openerp-web==6.0.1', 'openerp-web')
  File "/usr/lib/python2.6/dist-packages/pkg_resources.py", line 467, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/lib/python2.6/dist-packages/pkg_resources.py", line 1200, in run_script
    execfile(script_filename, namespace, namespace)
  File "/usr/local/lib/python2.6/dist-packages/openerp_web-6.0.1-py2.6.egg/EGG-INFO/scripts/openerp-web", line 4, in <module>
    from openobject.commands import start, ConfigurationError
  File "/usr/local/lib/python2.6/dist-packages/openerp_web-6.0.1-py2.6.egg/openobject/commands.py", line 8, in <module>
    from cherrypy._cpconfig import as_dict
ImportError: cannot import name as_dict

Solution: easy_install cherrypy==3.1.2