最后发现好像是 py3.7 的问题，换成 py2.7 可以了。
参考： https://forums.fast.ai/t/pycharm-ide-debugger-exception/28909/4

@chenqh 但是我发现在虚拟机中使用 pycharm 调试，在使用了进程池的附近也会报一样的 KeyboardInterrupt 错误，看来不是远程调试的问题，不过师傅已经帮我解决了一个问题，师傅请问微信或者 qq 私聊或者发我吧，我给师傅转钱，我的 qq 是 9614 六 2392
@lniwn 提前下好，下到出错的后面了，也不行呢，感谢师傅。

@chenqh 多谢师傅回复，没想到确实是这样，stream.write(message)改成 stream.write(message.decode('utf-8'))就可以了。

pycon 群里刘师傅说了一个问题，“你用的是虚拟环境下的 python，为啥报错目录是 /usr/local/python3 呢”
我也感觉好奇怪，按道理来说，报错应该是在虚拟环境下的吧？！

@lolizeppelin 为何不要用制表符呢？能详细说下吗

@chinawrj 感谢感谢，是我要的答案，嘿嘿。

@kslr 兄弟没听明白你的意思，我只在一台机器运行一个 worker，在 20 台机器运行 20 个 worker。。

目前可以通过这种方式来获得：
http://docs.celeryproject.org/en/latest/userguide/workers.html#inspecting-workers

@daya 首先清除 gunicorn 多余进程，使用 netstat -antlp | grep port 或者 ps -ef | grep guni，然后 sudo kill -9 pid
然后再把 gevent-websocket 换成 gevetn，因为前者不支持 py3
最后把 flask-socketio 的 async_mode 换成 eventlet 而不是 gevent，gevent 会一直发送类似心跳包的东西，不知道有没有选项可以清除。

已解决，感谢各位的帮助，特别是 itertools。

@itertools 确实，老哥，能加您个 QQ 吗？想感谢您一下，gevent+flask-socketio 就会一直发请求并且 pending，eventlet 则不会，怎么会这样我也不明白，我的扣扣 9614 六 2392，期待老哥，哈哈。

@itertools 我晕，我本地不加 gunicorn，socketio.run(app=app, host='0.0.0.0', port=5000, debug=True)，指定 async_mode='gevent'，也会一直 pending，一直请求。。。

@itertools 我 flask 应用程序的启动代码：socketio.run(app=app, host='0.0.0.0', port=5000, debug=True)
其中 socketio 初始化时，指定了 async_mode='gevent'，是这个原因吗？然后 gunicorn 也使用了 gevent。

@itertools 前辈，我这一直发请求，这个有啥好办法解决吗？

@itertools 是的，不支持 py3，真是我的锅，第一次部署花了很多时间，使用了 gevent 之后没有 402 错误了，但是会一直 pending，gunicorn 日志显示好像是心跳包，正在找办法关了它。。。
[2018-10-11 16:40:27 +0800] [12128] [INFO] Shutting down: Master
[2018-10-11 16:41:47 +0800] [13014] [INFO] Starting gunicorn 19.9.0
[2018-10-11 16:41:47 +0800] [13014] [INFO] Listening at: http://127.0.0.1:5000 (13014)
[2018-10-11 16:41:47 +0800] [13014] [INFO] Using worker: gevent
[2018-10-11 16:41:47 +0800] [13017] [INFO] Booting worker with pid: 13017
Server initialized for gevent.
94207eaf37114c118b05480ba12679ef: Sending packet OPEN data {'sid': '94207eaf37114c118b05480ba12679ef', 'upgrades': [], 'pingTimeout': 60000, 'pingInterval': 25000}
94207eaf37114c118b05480ba12679ef: Sending packet MESSAGE data 0
94207eaf37114c118b05480ba12679ef: Received packet MESSAGE data 0/process_upload_csv
94207eaf37114c118b05480ba12679ef: Sending packet MESSAGE data 0/process_upload_csv
94207eaf37114c118b05480ba12679ef: Received packet PING data None
94207eaf37114c118b05480ba12679ef: Sending packet PONG data None
94207eaf37114c118b05480ba12679ef: Received packet PING data None
94207eaf37114c118b05480ba12679ef: Sending packet PONG data None
94207eaf37114c118b05480ba12679ef: Received packet PING data None

清理了 gunicorn 进程，抛弃了 websocket-gevent，使用了 gevent，gunicorn -b 127.0.0.1:5000 -k gevent -w 1 module:app，不再报 402 错误了，但是程序还是会一直 pending，一直发请求。。。


开启了 flask-socketio 的日志，现在重新启动，ps -ef | grep guni 出现 2 行，其中 1 行是 work，work 数应该没错，日志现在报错，继续搜索解决方案，
[2018-10-11 15:19:04 +0800] [697] [INFO] Starting gunicorn 19.9.0
[2018-10-11 15:19:04 +0800] [697] [INFO] Listening at: http://127.0.0.1:5000 (697)
[2018-10-11 15:19:04 +0800] [697] [INFO] Using worker: geventwebsocket.gunicorn.workers.GeventWebSocketWorker
[2018-10-11 15:19:04 +0800] [700] [INFO] Booting worker with pid: 700
Server initialized for gevent.
bae5c5f54be848fcabd9e5cfe8ce59fa: Sending packet OPEN data {'sid': 'bae5c5f54be848fcabd9e5cfe8ce59fa', 'upgrades': ['websocket'], 'pingTimeout': 60000, 'pingInterval': 25000}
bae5c5f54be848fcabd9e5cfe8ce59fa: Sending packet MESSAGE data 0
bae5c5f54be848fcabd9e5cfe8ce59fa: Received packet MESSAGE data 0/process_upload_csv
bae5c5f54be848fcabd9e5cfe8ce59fa: Sending packet MESSAGE data 0/process_upload_csv
Traceback (most recent call last):
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 975, in handle_one_response
self.run_application()
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/geventwebsocket/handler.py", line 82, in run_application
self.process_result()
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 909, in process_result
self.write(data)
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 756, in write
self._write_with_headers(data)
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 777, in _write_with_headers
self._write(data)
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 741, in _write
self._sendall(data)
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 703, in _sendall
self.socket.sendall(data)
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/_socket3.py", line 457, in sendall
data_memory = _get_memory(data)
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/_socket3.py", line 45, in _get_memory
mv = memoryview(data)
TypeError: memoryview: a bytes-like object is required, not 'str'
2018-10-11T07:20:48Z {'REMOTE_ADDR': '127.0.0.1', 'REMOTE_PORT': '54310', 'HTTP_HOST': '10.26.15.222', (hidden keys: 31)} failed with TypeError

bae5c5f54be848fcabd9e5cfe8ce59fa: Client is gone, closing socket
bae5c5f54be848fcabd9e5cfe8ce59fa: Client is gone, closing socket
ca996671e95d4e54834a745c9129caa8: Sending packet OPEN data {'sid': 'ca996671e95d4e54834a745c9129caa8', 'upgrades': ['websocket'], 'pingTimeout': 60000, 'pingInterval': 25000}
ca996671e95d4e54834a745c9129caa8: Sending packet MESSAGE data 0
ca996671e95d4e54834a745c9129caa8: Received packet MESSAGE data 0/process_upload_csv
ca996671e95d4e54834a745c9129caa8: Sending packet MESSAGE data 0/process_upload_csv
Traceback (most recent call last):
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 975, in handle_one_response
self.run_application()
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/geventwebsocket/handler.py", line 82, in run_application
self.process_result()
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 909, in process_result
self.write(data)
File "/root/.local/share/virtualenvs/asset-ar0OxIPP/lib/python3.7/site-packages/gevent/pywsgi.py", line 756, in write