Don't remove empty cells by default #784
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| > jupyter nbconvert --RegexRemovePreprocessor.enabled=True \ |
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The default value for the enabled flag appears to be False. We should either override the default value for the RegexRemovePreprocessor or keep the --RegexRemovePreprocessor.enabled=True flag. Or is a preprocessor enabled automatically if one of its attributes (patterns) is set?
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@tillahoffmann Thanks for the review!
I'm not quite sure, but I think the preprocessor is enabled by default because of this:
nbconvert/nbconvert/exporters/templateexporter.py
Lines 126 to 135 in 9f5c402
I don't care if it is enabled or not, as long as it doesn't remove stuff by default.
| modify the patterns traitlet. For example, execute the following command | ||
| to convert a notebook to html and remove cells containing only whitespace: | ||
| to convert a notebook to html and remove cells containing only whitespace:: |
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Small typo of an extra : here.
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This is actually reST syntax, see http://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html#literal-blocks
Without that, the formatting doesn't work, see the currently broken docs:
https://nbconvert.readthedocs.io/en/5.3.1/api/preprocessors.html#nbconvert.preprocessors.RegexRemovePreprocessor
| The first command line argument enables the preprocessor and the second | ||
| sets the list of patterns to '\\s*\\Z' which matches an arbitrary number | ||
| The command line argument | ||
| sets the list of patterns to ``'\\s*\\Z'`` which matches an arbitrary number |
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Are single back ticks sufficient here?
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I tried it, and apparently not.
Sphinx allows to customize the formatting of single backticks, but it is apparently not configured for typewriter text (and I also don't think it would be a good idea to do so).
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@tillahoffmann Is there anything else you need me to do? |
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Happy for this PR to be merged. As an aside, thank you for the detailed Sphinx explanation. |
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Thanks! |
Since there was no real response to #720, I thought I'll try it with a pull request ...
This PR restores the sane behavior of not removing stuff without the user wanting to remove stuff.
It also fixes the docstring so if people actually want to remove stuff, they can learn how to do that.