Disable torch import on cuda-less runs

skynet/cli.py

@@ -1,4 +1,6 @@
 #!/usr/bin/python
+import importlib.util
+torch_enabled = importlib.util.find_spec('torch') != None
 
 import os
 import json
@@ -10,8 +12,10 @@ import trio
 import click
 import trio_asyncio
 
+if torch_enabled:
     from . import utils
     from .dgpu import open_dgpu_node
+
 from .brain import run_skynet
 from .constants import ALGOS