Traceback (most recent call last):

 "<string>", line 59, in <module>

 "<string>", line 12, in **init**

 "site-packages\flask_socketio__init__.py", line 119, in **init**

 "site-packages\flask_socketio__init__.py", line 144, in init_app

 "site-packages\socketio\server.py", line 72, in **init**

 "site-packages\engineio\server.py", line 100, in **init**ValueError: Invalid async_mode specified
Traceback (most recent call last):


 "/nix/store/lm2jmpn00yjizgqyimaa973gsp2ap8vw-python3.6-dvc-0.40.7/bin/.dvc-wrapped", line 12, in <module>

sys.exit(main())


 "/nix/store/lm2jmpn00yjizgqyimaa973gsp2ap8vw-python3.6-dvc-0.40.7/lib/python3.6/site-packages/dvc/main.py", line 53, in main

Analytics().send_cmd(cmd, args, ret)


 "/nix/store/lm2jmpn00yjizgqyimaa973gsp2ap8vw-python3.6-dvc-0.40.7/lib/python3.6/site-packages/dvc/analytics.py", line 261, in send_cmd

daemon(["analytics", analytics.dump()])


 "/nix/store/lm2jmpn00yjizgqyimaa973gsp2ap8vw-python3.6-dvc-0.40.7/lib/python3.6/site-packages/dvc/daemon.py", line 103, in daemon

env['PYTHONPATH']
KeyError: 'PYTHONPATH'
