simulation.py

import random

def simulate(bank=1000.0, percentage=2.0, races=10000):
    min_odds = 2.4
    max_odds = 13.0
    sample_odds = [3,6,21,5.5,5.5,5,2.8,18,8,6.5,4,3.3,2.4,21,5,3.2,3.3,6.5,5.5,16,3.4,26]
    original_bank = bank
    want_to_win = (percentage / 100) * bank
    races_run = 0
    wins = 0
    losses = 0

    for race_number, race in enumerate(range(races + 1)):
        races_run = races_run + 1
        deficit = max(original_bank - bank, 0)
        odds = round(random.uniform(min_odds, max_odds), 2)
        #odds = float(random.choice(sample_odds))
        bet = round((want_to_win + deficit) / odds, 2)

        if bet > bank:
            print("We cant bet on Race %d, we're out of money." % race_number)
            break

        bank = bank - bet # place the bet

        #won = random.choice(range(1, 9)) == 1  # uses number of runners to calculate win odds
        won = win_or_lose(odds)  # uses odds to calculate chances of winning
        if won:
            wins = wins + 1
            winnings = want_to_win + deficit
            bank = bank + winnings
            print("Race %d. Odds %.2f. Bet $%.2f. WON $%.2f" % (race_number, odds, bet, winnings))
        else:
            losses = losses + 1
            print("Race %d. Odds %.2f. Bet $%.2f. LOST." % (race_number, odds, bet))

        print("Current Bank: $%f" % bank)

    print("------------------------------------------------")
    print("Finished Simulation after %d races." % (races_run))
    if losses == 0:
        # dont divide by zero
        losses = 1
    win_percent = round((wins / losses) * 100, 2)
    print("Wins %d, Losses: %d, Win %%: %%%.2f " % (wins, losses, win_percent))
    winnings = bank - original_bank
    print("|Bank: $%.2f. Winnings: $%.2f" % (bank, winnings))

    if bank > original_bank:
        print("Success")
        return True
    else:
        print("Failure")
        return False

def win_or_lose(odds):
    percent_win = 16.45 # (1.0 / odds) * 100
    pick = random.uniform(1.00, 100.00)
    print("percent_win: %.2f" % percent_win)
    print("pick: %.2f" % pick)
    return pick <= percent_win

if __name__ == '__main__':
    wins = 0
    losses = 0
    for x in range(100):
        if simulate():
            wins = wins + 1
        else:
            losses = losses + 1
    print("|100 simulations run. Wins %d, Losses: %d" % (wins, losses))