def subtract_tokens(tokens_a, tokens_b):
'''
Compute tokens_a - token_b ie for all color in colors, tokens_a[color] - tokens_b[color]
'''
result = game.get_empty_token_bag()
for color in result:
result[color] = tokens_a[color] - tokens_b[color]
return result
def compute_discounted_price(self, card):
'''
If you hold bonuses, you have a discount on dvpt cards. This function computes and returns such discounted price
'''
discounted_price = game.get_empty_token_bag()
for color, price in card.price.items():
discounted_price[color] = positive_part(price -
self.bonuses[color])
return discounted_price
discounted_price = subtract_tokens(card.price, self.bonuses)
for color, price in discounted_price.items():
# Forbid negative prices
if price < 0:
discounted_price[color] = 0
return discounted_price