Could not run wsstat about asyncio.async

[cuiyijiee]

hi , when i run wsstat --demo on my mac with python3.7 , it just show this:

ivydeMac-mini-2:~ ivy$ wsstat --demo
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.7/bin/wsstat", line 11, in <module>
    load_entry_point('wsstat==1.3.0', 'console_scripts', 'wsstat')()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pkg_resources/__init__.py", line 487, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2728, in load_entry_point
    return ep.load()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2346, in load
    return self.resolve()
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pkg_resources/__init__.py", line 2352, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/wsstat/main.py", line 5, in <module>
    from wsstat.clients import WebsocketTestingClient
  File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/wsstat/clients.py", line 24
    asyncio.ensure_future = asyncio.async
                                        ^
SyntaxError: invalid syntax

this is my pip3 installed modules

ivydeMac-mini-2:~ ivy$ pip3 list
Package        Version
-------------- -------
asyncio        3.4.3  
atomicwrites   1.2.1  
attrs          18.2.0 
more-itertools 5.0.0  
pip            18.1   
pluggy         0.8.0  
py             1.7.0  
pytest         4.0.2  
setuptools     40.6.2 
six            1.12.0 
urwid          2.0.1  
websockets     7.0    
wsstat         1.3.0  

i am not good at python ,but i want to use this great repository ,plz help me , thank you !