Switch statements again

[Andrew Dalke]

Steven Scott wrote:
 >  my question is simply "what's the best way to do this in python?"

day_offsets = {
   MASK_SUNDAY: 6,
   MASK_MONDAY: 5,
   MASK_TUESDAY: 4,
   ...
   MASK_SATURDAY: 0,
}

  ...

try:
   dayOfWeek -= day_offsets[calDayOfWeekMask]
except KeyError:
   return FAIL

if calWeekNumber == LAST:
   day = occurence.getDaysInMonth()
   add_days = -((7 - dayOfWeek +
                 occurence.getDayOfWeek()) % 7)
else:
   day = 1 + ((calWeekNumber - 1) *7
   add_days = dayOfWeek + 7 - occurrence.getDayOfWeek()) % 7

occurence.setDay(day)
occurence.addDays(add_days)


I prefer to move the "setDay" and "addDays" method calls to
the end because it's easier to see that both routes end
up changing the occurence the same way.  YMMV.

					Andrew
					dalke at dalkescientific.com