# Monday, March 19, 2018¶

I fixed #2348 (Output of doctest.show_fields() differs (Python 2*3)). This was not an easy one. It seems that the sort order of the 3 virtual fields defined on lino.core.model.Model (workflow_buttons etc) was not correct under Python 2. As a workaround I added an option all=False to lino.api.show_fields() which hides fields that have no help_text. Of course this caused some existing test snippets to fail. And en passant I updated some help texts.

A failure in Python dumps by example was another example why it is difficult to delegate this job because it requires quite some experience with the Lino internals. When Hamza asked me some weeks ago how to handle this failure, I told him to maybe create two different directories for the expected files, one for Python 2 and another for Python 3. When I now looked at it, I saw that there was an easier and better way: BabelFields still used a u prefix when writing their values to the stream. I removed that u and voilà!

There were several doctests which failed because the attributes of an <a> tag in Python 3 are not in the same order as in Python 2. You never know which of the following lines would come:

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During a production upgrade for CPAS de Châtelet I made an optimization about the behaviour of choicelists in a python dump. And yes, it seems that specifying the default value for a choicelist field no longer requires that as_callable method, simply specify the choice’s name as a string. That’s because ChoiceListField.to_python() now resolves string values also as names.