unale to run the example about wampy HOT 10 CLOSED

File "/home/erc/.virtualenvs/python3/lib/python3.4/site-packages/wampy/cli/run.py", line 70, in run
    router = Crossbar(config_path)

class Crossbar(ParseUrlMixin):

    def __init__(
        self,
        url="ws://localhost:8080",
        config_path="./crossbar/config.json",
        crossbar_directory=None, 
    ):

        config_path="./crossbar/config.json",
        url="ws://localhost:18080",
        #config_path="./crossbar/config.json",

 wampy run docs.examples.services:BinaryNumberService --config ./crossbar/config.json  
docs.examples.services ./crossbar/config.json
ws://localhost:18080
ws://localhost:18080
starting up service....
BinaryNumberService is now running and connected.
'gevent._greenlet.Greenlet' object has no attribute 'wait'
Traceback (most recent call last):
  File "/home/erc/.virtualenvs/python3/lib/python3.4/site-packages/wampy/transports/websocket/connection.py", line 70, in receive
    bytes = self.socket.recv(bufsize)
  File "/home/erc/.virtualenvs/python3/lib/python3.4/site-packages/gevent/_socket3.py", line 382, in recv
    self._wait(self._read_event)
  File "src/gevent/_hub_primitives.py", line 265, in gevent.__hub_primitives.wait_on_socket
  File "src/gevent/_hub_primitives.py", line 266, in gevent.__hub_primitives.wait_on_socket
  File "src/gevent/_hub_primitives.py", line 252, in gevent.__hub_primitives._primitive_wait
  File "src/gevent/_hub_primitives.py", line 46, in gevent.__hub_primitives.WaitOperationsGreenlet.wait
  File "src/gevent/_hub_primitives.py", line 46, in gevent.__hub_primitives.WaitOperationsGreenlet.wait
  File "src/gevent/_hub_primitives.py", line 55, in gevent.__hub_primitives.WaitOperationsGreenlet.wait
  File "src/gevent/_waiter.py", line 151, in gevent.__waiter.Waiter.get
  File "src/gevent/_greenlet_primitives.py", line 59, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 59, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/_greenlet_primitives.py", line 63, in gevent.__greenlet_primitives.SwitchOutGreenletWithLoop.switch
  File "src/gevent/__greenlet_primitives.pxd", line 35, in gevent.__greenlet_primitives._greenlet_switch
greenlet.GreenletExit

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "src/gevent/greenlet.py", line 716, in gevent._greenlet.Greenlet.run
  File "/home/erc/.virtualenvs/python3/lib/python3.4/site-packages/wampy/session.py", line 163, in connection_handler
    frame = connection.receive()
  File "/home/erc/.virtualenvs/python3/lib/python3.4/site-packages/wampy/transports/websocket/connection.py", line 71, in receive
    except gevent.greenlet.GreenletExit as exc:
AttributeError: 'module' object has no attribute 'GreenletExit'
2018-10-13T18:50:34Z <Greenlet "Greenlet-0" at 0x7fd3f97ebe48: connection_handler> failed with AttributeError

disconnected

pip freeze
gevent==1.3.7
greenlet==0.4.15
simplejson==3.11.1
six==1.10.0
wampy==0.9.17

import datetime
from wampy.peers.clients import Client
from wampy.roles.callee import callee

class DateService(Client):
    """ A service that returns the current date.
    """  
    @callee
    def get_todays_date(self):
        return datetime.date.today().isoformat()

from test_service import *
client = DateService()
client.start()

from wampy.peers.clients import Client
with Client() as client:
    result = client.rpc.DateService()

import datetime
from wampy.peers.clients import Client
from wampy.roles.callee import callee
from wampy.roles.subscriber import subscribe

class DateService(Client):
    """ A service that returns the current date.
    """  # NOQA
    @callee
    def get_todays_date(self):
        return datetime.date.today().isoformat()


class SubscribingService(Client):
    """ A service that prints out "foo" topic messages
    """  # NOQA
    @subscribe(topic="foo")
    def foo_handler(self, **kwargs):
        print("foo message received: {}".format(kwargs))


class BinaryNumberService(Client):

    @callee
    def get_binary_number(self, number):
        return bin(number)


class AppRunner(object):

    def __init__(self):
        self.apps = []

    def add_app(self, app):
        self.apps.append(app)

    def run(self):
        for app in self.apps:
            app.start()

    def stop(self):
        for app in self.apps:
            app.stop()

    def wait(self):
        for app in self.apps:
            try:
                app.session._managed_thread.wait()
            except Exception as exc:
                print(exc)
                app.stop()


def run(apps):

    # router = Crossbar(config_path)
    # app = app_class(router=router)
    runner = AppRunner()
    for app in apps:
        app = app()
        runner.add_app(app)
    print("starting up service....")
    runner.run()

    # print("{} is now running and connected.".format(app_name))

    while True:
        try:
            runner.wait()
        except KeyboardInterrupt:

            try:
                runner.stop()
            except KeyboardInterrupt:
                runner.stop()

        else:
            # runner.wait completed
            break

    print('disconnected')

def main():
    apps = [DateService, SubscribingService, BinaryNumberService]
    run(apps)

if __name__ == '__main__':
    main()

In [4]: dir(a)
Out[4]: 
['GreenletExit',
 '_Greenlet__cancel_start',
 '_Greenlet__handle_death_before_start',
 '_Greenlet__never_started_or_killed',
 '_Greenlet__start_cancelled_by_kill',
 '_Greenlet__start_completed',
 '_Greenlet__start_pending',
 '_Greenlet__started_but_aborted',
 '__bool__',
 '__class__',
 '__delattr__',
 '__dict__',
 '__doc__',
 '__format__',
 '__getattribute__',
 '__getstate__',
 '__hash__',
 '__init__',
 '__module__',
 '__new__',
 '__nonzero__',
 '__reduce__',
 '__reduce_ex__',
 '__repr__',
 '__setattr__',
 '__sizeof__',
 '__str__',
 '__subclasshook__',
 '_exc_info',
 '_formatinfo',
 '_has_links',
 '_kwargs',
 '_links',
 '_notifier',
 '_notify_links',
 '_raise_exception',
 '_report_error',
 '_report_result',
 '_run',
 '_stack_saved',
 '_start_event',
 'args',
 'dead',
 'error',
 'exc_info',
 'exception',
 'get',
 'getcurrent',
 'gettrace',
 'gr_frame',
 'join',
 'kill',
 'kwargs',
 'link',
 'link_exception',
 'link_value',
 'loop',
 'parent',
 'rawlink',
 'ready',
 'run',
 'settrace',
 'spawn',
 'spawn_later',
 'start',
 'start_later',
 'started',
 'successful',
 'switch',
 'throw',
 'unlink',
 'value']

In [5]: a.join?
Signature: a.join(timeout=None)
Docstring:
Wait until the greenlet finishes or *timeout* expires.
Return ``None`` regardless.
File:      ~/.virtualenvs/base/local/lib/python2.7/site-packages/gevent/greenlet.py
Type:      instancemethod