A syntax that would work (which atm is a syntax error, and requires no new keyword) would be student_by_school = {school: [student] for school, student in student_school_list, grouped=True} with grouped=True being a modifier on the dict comprehension so that at each iteration loop current_dict[key] = value if key not in current_dict else current_dict[key] + value This is an extremely borderline syntax (as it is perfectly legal to put **{'grouped': True} in a dict comprehension), but it works. It even keeps the extremely important "should look like a template of the final object" property. But it doesn't requires me to defines 2 lambda functions just to do the job of a comprehension. -- Nicolas Rolin 2018-06-29 4:57 GMT+02:00 Michael Selik <mike@selik.org>:
On Thu, Jun 28, 2018, 6:46 PM Nicolas Rolin <nicolas.rolin@tiime.fr> wrote:
The questions I should have asked In my original post was : - Is splitting lists into sublists (by grouping elements) a high level enough construction to be worthy of a nice integration in the comprehension syntax ?
My intuition is no, it's not important enough to alter the syntax, despite being an important task.
- In which case, is there a way to find a simple syntax that is not too
confusing ?
If you'd like to give it a shot, try to find something which is currently invalid syntax, but does not break compatibility. The latter criteria means no new keywords. The syntax should look nice as a single line with reasonably verbose variable names.
One issue is that Python code is mostly 1-dimensional, characters in a line, and you're trying to express something which is 2-dimensional, in a sense. There's only so much you can do without newlines and indentation.
-- -- *Nicolas Rolin* | Data Scientist + 33 631992617 - nicolas.rolin@tiime.fr <prenom.nom@tiime.fr> *15 rue Auber, **75009 Paris* *www.tiime.fr <http://www.tiime.fr>*