shopsmart.py

Python 实用例程

import shop

def shopSmart(orderList, fruitShops):
    """
        orderList: List of (fruit, numPound) tuples
        fruitShops: List of FruitShops
    """    
    
    minCost, argMin = None, None
    for shop in fruitShops:
        cost = shop.getPriceOfOrder(orderList)
        if minCost == None or cost < minCost:
            minCost, argMin = cost, shop
    return argMin
    
if __name__ == '__main__':
  orders = [('apples',1.0), ('oranges',3.0)]
  dir1 = {'apples': 2.0, 'oranges':1.0}
  shop1 =  shop.FruitShop('shop1',dir1)
  dir2 = {'apples': 1.0, 'oranges': 5.0}
  shop2 = shop.FruitShop('shop2',dir2)
  shops = [shop1, shop2]
  print "For orders: ", orders, "best shop is", shopSmart(orders, shops).getName()
  orders = [('apples',3.0)]
  print "For orders: ", orders, "best shop is", shopSmart(orders, shops).getName()