draw.py

import random

donors = [
    (0.009559, '0x1cb9e58e03b3365434a863935e8b92a178bb9d60'),
    (0.8, '0x23ee0a4332be289c39a92b3324043f06973edbb9'),
    (11.0, '0x6162b1e823644580f06cefd5aa51c65b5bb56f2e'),
    (2, '0x831cffd303252765ba1fe15038c354d12cebabd1'),
    (2.362, '0xdd289578d8915156de085df3d03062335238a293'),
    (2.386913, '0xb9b79944fad2956413a8979fc05d39464f1d5249'),
    (1.0, '0x82eae6c30ed9606e2b389ae65395648748c6a17f'),
    (50.0, '0xe10c540088113fa6ec00b4b2c8824f8796e96ec4'),
    (66.0, '0xd1b39607285d6b8497c3ec3e1b0138c3a34c2d4a'),
    (0.12986353, '0x0b0dcbd0cc60e9dcdf85d565791aafa8f0d7b1dc'),
    (200.0, '0xa0510da4eea8247135a6cabbf5f5e7f39275393c'),
]
total = sum(donor[0] for donor in donors)

prizes = [
    "Atlas Reactor - All Freelancers Edition",
    "Down and Out in Purgatory",
    "How Real Men Do It",
    "Mad City",
    "Double Play",
    "Deadfall",
    "Now We Are Sick",
    "Telling Tales",
    "Magic Origins Deck Builder's Toolkit",
    "Pairs: Lord of the Fries",
    "RIFT Starfall Prophecy - Standard Edition",
    "The End of the World RPG: Wrath of the Gods",
    "Van Helsing",
    "YEARS BEST DARK FANTASY & HORROR 2011"
]

blockhash = 'e98123672cbeefbf10d9bba47ecfced90620d87ba3c8e269611e88155600edb6'.decode('hex')

rand = random.Random(blockhash)

for prize in prizes:
    value = rand.uniform(0, total)
    for donor_amount, donor_address in donors:
        if value <= donor_amount:
            print "%s wins %s" % (donor_address, prize)
            break
        value -= donor_amount