Python 3 File Open Syntax
In Python 3, the syntax for opening a file has changed from using the file(..)
builtin to using open(..)
: http://python3porting.com/differences.html#file
This manifests first on line 236 of sdn.py: https://gitlab.flux.utah.edu/safeedge/nlsdn/blob/master/src/nlsdn/server/sdn.py#L236
Edited by Simon Redman