Sorting a list of folders based upon PART of the folder id
I have an application where a front-end constrains the ids of created folders so that they have some significance to the application. I'd like to be able to sort these folders using Python's sort facility, but I am having problems doing this within a Zope Page Template. As an example, I would like to be able to do an alphabetic sort of the folder IDs based upon the concatenation of the last and first characters of the idea. I suppose that I could create a Python module to do this, but I was hoping for a slick way to do it entirely within Zope. Suggestions appreciated. Also, has anyone written a SQL-like ORDER-BY or GROUP-BY sort routine for Zope/Python? Sean McLinden Allegheny County Health Department
mclinden@informed.net wrote:
I have an application where a front-end constrains the ids of created folders so that they have some significance to the application. I'd like to be able to sort these folders using Python's sort facility, but I am having problems doing this within a Zope Page Template.
Put it into a python script. Much easier, and an allround good habbit.
As an example, I would like to be able to do an alphabetic sort of the folder IDs based upon the concatenation of the last and first characters of the idea. I suppose that I could create a Python module to do this, but I was hoping for a slick way to do it entirely within Zope.
You can use a python script for sorting: zope_objects.sort( lambda x,y: cmp( (x.getId()[0], x.getId()[-1]), (y.getId()[0], y.getId()[-1]) ) ) But it isn't that nice. The dsu method is most likely both faster and easier to read: decorated = [(o.getId()[0], o.getId()[-1]) for o in zope_objects] decorated.sort() sorted_objects = [d[-1] for d in decorated]
Also, has anyone written a SQL-like ORDER-BY or GROUP-BY sort routine for Zope/Python?
You can just do a sort on any attribute(s). zope_objects.sort(lambda x,y: cmp(x.meta_type, y.meta_type)) regards Max M
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