Enthought Tool Suite configuration

[oesteban]

ETS should be configured to use the null toolkit as in https://github.com/nipy/nipype/blob/master/nipype/algorithms/mesh.py#L77. However this results in a ValueError if it is already set (which is very common with ipython).

I think this setting should be done at the very beginning when importing nipype, isn't it?

[satra]

perhaps you can see how matplotlib backends are set and perform this alongside it?

[oesteban]

Sure, I just wanted to propose it. If you agree, I'll get it done :)

[oesteban]

@satra, how could I set the environment variable ETS_TOOLKIT='null' before anything else is executed in nipype?

[satra]

@oesteban - you would have to do it in the environment outside. within nipype we try not to touch the environment unless necessary.

[oesteban]

@chrisfilo said (#1219 (comment)):

This might be a better way of doing this: >

nipype/nipype/interfaces/ants/base.py

Line 63 in c31a5a8

if ( ALT_ITKv4_THREAD_LIMIT_VARIABLE in self.inputs.environ ):

Agreed, but that is a CommandLine interface, so it has it's own environment and we can handle it. In this case, as it is a BaseInterface, the system-wide environment is used.

@satra, what if we save the environment first and then we restore it after loading tvtk?

[satra]

that should work. the only thing i don't know is if multiprocessing preserves separate environments (i think it does).