template flag does not override config file

[t-makaro]

To change the default template I added:

c.LatexExporter.template_file = 'mytemplate.tplx'

to my jupyter_nbconvert_config.py file.

So, running:

jupyter nbconvert --to pdf somenotebook.ipynb

will use mytemplate.tplx as expected.

Occasionally, I still need to use a different template, so I run:

jupyter nbconvert --to pdf somenotebook.ipynb --template myothertemplate.tplx

But that still compiles using mytemplate.tplx instead. If I remove the line from the config file, then the --template flag works as expected.

[takluyver]

I think what's happening is that the --template option is equivalent to configuring TemplateExporter.template_file. LatexExporter subclasses TemplateExporter, so the more specific config field wins.

I don't see any general fix for that. We could probably hack a specific workaround for --template, but every such hack just makes configuration still more confusing.