擅长:python、mysql、java
<p>可以把这句话写下来,但我不认为这会有帮助。你正在循环查看价格字典,但应该循环查看订单列表,然后在字典中查找水果。在</p>
<pre><code>def buyLotsOfFruit(orderList):
totalCost = 0.0
for fruit, quantity in orderList:
if fruit not in fruitPrices:
print 'not here!'
else:
totalCost = totalCost +fruitPrices[fruit]* quantiy
return totalCost
</code></pre>