Wow... I'm really slipping here with the leaps years, good catch on the 2000s. And yeah, a list does make a whole lot more sense. Thanks Dave.
I've checked multiple sources on Zeller's formula, initially came across it on this book on vedic math (highly recommend it): http://amzn.to/bNXBM6. But here's the Wikipedia on it: http://en.wikipedia.org/wiki/Zeller%27s_congruence It's not *2 in the Julian calendar, but it is in Gregorian, which is what we're also using for the leap yrs - http://en.wikipedia.org/wiki/Leap_year On Tue, Sep 28, 2010 at 9:34 PM, Dave Angel <da...@ieee.org> wrote: > On 9/28/2010 5:11 PM, Carter Danforth wrote: > >> Thanks for the replies, Dave and Joel. The reason I'm not just using the >> time or datetime modules for a random date is because it's restricted to >> 1970-2038; I'm pulling dates from 1600-3099. Thanks a lot for the pointer >> about the leap years, Dave, as well the class instances; just updated it >> and >> it's all working now, and also included the rest of the code too w/ answer >> verification and time tracking. >> >> I want to start using this program to test myself for speed calculation >> using Zeller's formula, it's pretty cool for determining the days of dates >> - >> http://mathforum.org/dr/math/faq/faq.calendar.html >> >> Because of the way variables C and D are split up from the year in the >> formula, I split up the year for self.c and self.y. >> >> ------------------------ >> >> import random, time, datetime, calendar >> >> class Date: >> def __init__(self): >> self.c = random.randint(16,30) >> self.y = random.randint(0,99) >> self.month = random.randint(1,12) >> self.year = self.c*100 + self.y >> >> apr = [4,6,9,11] >> feb = [2] >> notleap = [1700, 1800, 1900, 3000] >> >> if self.month in feb: >> if self.year%4 == 0: >> if self.year in notleap: >> self.k = random.randint(1,28) >> else: >> self.k = random.randint(1,29) >> else: >> self.k = random.randint(1,28) >> elif self.month in apr: >> self.k = random.randint(1,30) >> else: >> self.k = random.randint(1,31) >> >> if self.month in [1,2]: >> d = self.y - 1 >> m = self.month + 10 >> else: >> d = self.y >> m = self.month - 2 >> >> z = self.k + (13*m-1)/5 + d + d/4 + self.c/4 - 2*self.c >> >> if z< 0: >> r = (abs(z)/7)*7 + z + 7 >> else: >> r = z%7 >> >> dict = { 0: 'Sunday', 1: 'Monday', 2: 'Tuesday', 3: 'Wednesday', >> 4: >> 'Thursday', 5: 'Friday', 6: 'Saturday' } >> self.day = dict[r] >> >> t1m = time.localtime().tm_min >> t1s = time.localtime().tm_sec >> t1 = t1m + t1s/100.0 >> n = 0 >> x = 0 >> >> while n< 10: >> newdate = Date() >> >> print '\n',calendar.month_name[newdate.month], newdate.k,',', >> newdate.year,'=', >> answer = raw_input() >> if answer.capitalize() == newdate.day: >> pass >> else: >> x += 1 >> n += 1 >> >> t2m = time.localtime().tm_min >> t2s = time.localtime().tm_sec >> t2 = t2m + t2s/100.0 >> td = t2 - t1 >> >> print '\n',x,'out of 10 wrong\nAvg time/question:',td/10,'\nTotal >> time:',td >> >> >> <snip> >> >> (You top-posted your response, so your message is out of order) > > I haven't tried to run your code, but there is at least one problem. > > Your notleap list is very incomplete. > > notleap = [1700, 1800, 1900, 2100, 2200, 2300, 2500, 2600, 2700, 2900, > 3000] > > I'm a little suspicious of your version of Zeller. I wouldn't think that > last term should have a 2* in it. > > I'm not sure why you use a dictionary to calculate self.day. A list would > work just as well. > > DaveA > > >
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