Setting filename_pattern for multiple galleries

[shanosborne]

When trying to create multiple galleries, I can set example_dirs and gallery_dirs to be lists, but I don't seem to be able to set filename_pattern to a list (which would allow me to set a different pattern for each of the galleries). When I try, I get the error:

Exception occurred:
  File "/Users/sosborne/miniconda3/envs/astroconda/lib/python3.6/re.py", line 289, in _compile
    p, loc = _cache[type(pattern), pattern, flags]
TypeError: unhashable type: 'list'
The full traceback has been saved in /var/folders/2c/0tbd0pkx6914vm8v2dvp2s3h0001jg/T/sphinx-err-gykhtvce.log, if you want to report the issue to the developers.

Is there a workaround / plan to make this possible?

[larsoner]

Nobody has thought of this that I know of. I have no problem with making this entry a str or list-like (tuple or list), where the str effectively (currently) gets promoted to [filename_pattern] * n_galleries. I don't think it would be too much work to code.

Let's wait a couple of days to see what others think, and if nobody objects, do you want to try doing it with a PR?