21.4. YearCollection.genYearsRev():
Generate years in reverse chronological order
noteweb
# - - - Y e a r C o l l e c t i o n . g e n Y e a r s R e v
def genYearsRev ( self ):
'''Generate years in reverse chronological order
'''
The set of keys to self.__yearMap is the
set of years. We extract it, sort it, reverse
it, and then generate the contained YearRow instances in that order.
noteweb
#-- 1 --
# [ yyyyList := keys of self.__yearMap in descending
# order ]
yyyyList = self.__yearMap.keys()
yyyyList.sort()
yyyyList.reverse()
#-- 2 --
# [ generate the YearRow instances in self in order by
# the elements of yyyyList ]
for yyyy in yyyyList:
yield self[yyyy]
#-- 3 --
raise StopIteration
