"Laguna" <[EMAIL PROTECTED]> writes: > I want to find the expiration date of stock options (3rd Friday of the > month) for an any give month and year. I have tried a few tricks with > the functions provided by the built-in module time, but the problem was > that the 9 element tuple need to be populated correctly. Can anyone > help me out on this one?
It's probably simplest to use the calendar module: http://docs.python.org/lib/module-calendar.html see the weekday function. > d0 = expiration(9, 2005) # d0 would be 16 > d1 = expiration(6, 2003) # d1 would be 20 > d2 = expiration(2, 2006) # d2 would be 17 # not completely tested import calendar def expiration(month, year): w1 = calendar.weekday(year, month, 1) # weekday of 1st of month f1d = 1 + (4-w1) % 7 # date of 1st friday return f1d + 14 # date of 3rd friday -- http://mail.python.org/mailman/listinfo/python-list
