按说明配置后，报错。

[ybnedsi]

Logger: homeassistant.helpers.entity
Source: custom_components/baidu_face/sensor.py:179
Integration: baidu_face (documentation)
First occurred: 01:01:37 (339 occurrences)
Last logged: 01:13:14

Update for sensor.face_indentity fails
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 350, in async_update_ha_state
await self.async_device_update()
File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 558, in async_device_update
raise exc
File "/usr/local/lib/python3.8/concurrent/futures/thread.py", line 57, in run
result = self.fn(*self.args, **self.kwargs)
File "/config/custom_components/baidu_face/sensor.py", line 138, in update
self.face_searching()
File "/config/custom_components/baidu_face/sensor.py", line 179, in face_searching
if ret['result'] is not None:
KeyError: 'result'