can not open web page

[chumwu]

Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/tornado-5.1.1-py2.7-linux-x86_64.egg/tornado/web.py", line 1590, in _execute
result = method(*self.path_args, **self.path_kwargs)
File "/usr/lib/python2.7/site-packages/tornado-5.1.1-py2.7-linux-x86_64.egg/tornado/web.py", line 3006, in wrapper
return method(self, *args, **kwargs)
File "/opt/DNSmasqWeb/xk_handler/xk_index.py", line 128, in get
"cpu":self.get_cpu()
File "/opt/DNSmasqWeb/xk_handler/xk_index.py", line 111, in get_cpu
return 100.0 - float(cpu)
ValueError: invalid literal for float(): 88.2 id