All config bools set to True by default in get_opt.py

[sammychristen]

I've noticed something in the code when creating my own config file.
On this line, all bools are automatically set to True, as they take a string as input.
It seems to only concern the variable "input_z" in the existing config file, as the variables "is_train" and "is_continue" are set to False here.

Could you describe what these variables are used for exactly?

Thanks for your help.