Damian Dailisan

To maintain python 2 compatibility, maybe you can use ```python from __future__ import print_function ``` This allows python 2 to use the print function with parentheses, while maintaining compatibility with...

Alternatively, solving #945 also resolves this issue.

I think this broke with #836, particularly because of line 135: https://github.com/flow-project/flow/blob/bc65245504e590604ffa3a49376e3367c318a475/flow/envs/base.py#L134-L136 which now fails to hit this conditional statement: https://github.com/flow-project/flow/blob/bc65245504e590604ffa3a49376e3367c318a475/flow/envs/base.py#L221-L225 A quick fix seems is to change `self.sim_params.render` to...