CATCHAT项目中socketio库问题
报错内容
Traceback (most recent call last):
File "/root/.local/share/virtualenvs/catchat-ztofOoC9/lib/python3.5/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/root/flask/catchat/catchat/__init__.py", line 20, in <module>
from catchat.blueprints.admin import admin_bp
File "/root/flask/catchat/catchat/blueprints/admin.py", line 17, in <module>
from catchat.models import User
File "/root/flask/catchat/catchat/models.py", line 21, in <module>
from catchat.extensions import db, login_manager
File "/root/flask/catchat/catchat/extensions.py", line 19, in <module>
from flask_socketio import SocketIO
File "/root/.local/share/virtualenvs/catchat-ztofOoC9/lib/python3.5/site-packages/flask_socketio/__init__.py", line 9, in <module>
from socketio import socketio_manage
File "/root/.local/share/virtualenvs/catchat-ztofOoC9/lib/python3.5/site-packages/socketio/__init__.py", line 3, in <module>
from .client import Client
File "/root/.local/share/virtualenvs/catchat-ztofOoC9/lib/python3.5/site-packages/socketio/client.py", line 6, in <module>
import engineio
File "/root/.local/share/virtualenvs/catchat-ztofOoC9/lib/python3.5/site-packages/engineio/__init__.py", line 3, in <module>
from .client import Client
File "/root/.local/share/virtualenvs/catchat-ztofOoC9/lib/python3.5/site-packages/engineio/client.py", line 44, in <module>
original_signal_handler = signal.signal(signal.SIGINT, signal_handler)
File "/usr/lib/python3.5/signal.py", line 47, in signal
handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler))
ValueError: signal only works in main thread
猜测与soketio有关系，报错来自开发环境，切换到生产模式没有此报错。
看到书上此处，可能有点关系，或者是启动方式不对？
