extensions in 'extra' ignore their configs if only 'extra' is requested

[lmfont]

I want all the extensions in extra, so instead of requesting all of them individually I just do something like

html = markdown.markdown(text, extensions=['extra'])

But I need to specify some options (for the 'footnotes' extension), so I include those in the options dict. These options get ignored when just specifying 'extra', I have to explicitly add 'footnotes' to the extensions list for them to be used.

A simple test case:

from markdown import Markdown

text1 = "[^1]\n\n[^1]: test1"
text2 = "[^1]\n\n[^1]: test2"

opts = {'footnotes': {'UNIQUE_IDS': True}}
md = Markdown(extensions=['extra'], extension_configs=opts)

print(md.convert(text1))
md.reset()
print(md.convert(text2))

python-markdown will re-use the footnote numbering, even though I set UNIQUE_IDS.

[waylan]

I thought this was documented but I'm not finding it. The extra extension is just a wrapper which enables each of the individual extensions. However, extra only has access to config options for the extra key. Therefore, for extra to have access to the configs to pass them on to the individual extensions, you need to nest the individual extensions within the extra config. Like this:

opts = {'extra': {'footnotes': {'UNIQUE_IDS': True}}}
md = Markdown(extensions=['extra'], extension_configs=opts)

We need to add this to the documentation. Thanks for the report.