Gateone 运行报 tornado httpserver.py SyntaxError

sh-4.2# gateone start
Traceback (most recent call last):
  File "/usr/bin/gateone", line 9, in <module>
    load_entry_point('gateone==1.2.0', 'console_scripts', 'gateone')()
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 378, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2566, in load_entry_point
    return ep.load()
  File "/usr/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load
    entry = __import__(self.module_name, globals(),globals(), ['__name__'])
  File "/usr/lib/python2.7/site-packages/gateone-1.2.0-py2.7.egg/gateone/core/server.py", line 361, in <module>
    import tornado.httpserver
  File "/usr/lib64/python2.7/site-packages/tornado/httpserver.py", line 144
    def __init__(self, *args: Any, **kwargs: Any) -> None:
                            ^
SyntaxError: invalid syntax

Gateone 项目：https://github.com/liftoff/GateOne 用 python3.6 没有这个报这个错误，但是会报其他包的 SyntaxError

github 上的 docker 是 from ubuntu，我用的 centos7，难道是系统问题？