Quoth Robocop <btha...@physics.ucsd.edu>:
> Hello again,
> I've found myself stumped when trying to organize this list of
> objects. The objects in question are timesheets which i'd like to
> sort by four attributes:
>
> class TimeSheet:
> department = string
> engagement = string
> date = datetime.date
> stare_hour = datetime.time
>
> My ultimate goal is to have a list of this timesheet objects which are
> first sorted by departments, then within each department block of the
> list, have it organized by projects. Within each project block i
> finally want them sorted chronologically by date and time.
>
> To sort the strings i tried:
>
> timesheets.sort(key=operator.attrgetter('string'))
>
> which is not doing anything to my list unfortunately; it leaves it
> untouched.
Python 2.6.1 (r261:67515, Jan 7 2009, 17:09:13)
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> class Timesheet(object):
... def __init__(self, department): self.department=department
... def __repr__(self): return "Timesheet(%s)" % self.department
...
>>> timesheets = [Timesheet('abc'), Timesheet('def'), Timesheet('acd')]
>>> timesheets
[Timesheet(abc), Timesheet(def), Timesheet(acd)]
>>> import operator
>>> timesheets.sort(key=operator.attrgetter('department'))
>>> timesheets
[Timesheet(abc), Timesheet(acd), Timesheet(def)]
The key bit here being the argument to attrgetter, which is the name
of the attribute to use as they key.
--RDM
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