An education concept of how can you gamble and earn enough money in N rounds game.

gambling.py

from time import sleep
import random

game_rounds = 10
test_times = 5
base_money = 100
win_rate = 70

def log(s):
    print(s)
    # sleep(0.8)

total_money_records = []
bet_rate_records = []
coin_flip = [True]*int(win_rate) + [False]*int(100-win_rate)
total_invested = base_money * game_rounds * test_times

for test_i in range(test_times):
    total_money = base_money
    bet_rate = 0.5
    for round_i in range(game_rounds):
        log(f'bet rate is {bet_rate}')

        is_won = random.choice(coin_flip)
        log(f'is won: {is_won}')

        if is_won:
            bet_rate *= 2
            total_money += int(total_money*bet_rate)
        else:
            bet_rate /= 2
            total_money -= int(total_money*bet_rate)

        if bet_rate > 0.5:
            log(f'limiting bet to 0.5')
            bet_rate = 0.5

        bet_rate_records.append(bet_rate)

        if total_money < 10:
            raise BrokenPipeError(f'Lost all money in round {round_i*test_i}')

        if bet_rate < 0.02:
            raise BrokenPipeError(f'Bet rate is too small {bet_rate}, lost after {round_i*test_i}')

    total_money_records.append(total_money)

print('\nSUMMERY:')
print('Avg per round:', (sum(total_money_records) - total_invested) / len(total_money_records))
print('Total money won:', sum(total_money_records) - total_invested)
print('lowest bet_rate:', min(bet_rate_records))