NP39 售罄的培根披萨

思路：

step1：参考uu们的才知道是错题emm；

代码如下：

pizza_inventory=['bacon','durian','bacon','bacon','chicken','durian']
while('bacon' in pizza_inventory):
    pizza_inventory.remove('bacon')
    print('A pastrami order was deleted from list.')
if('bacon' not in pizza_inventory):
    print('There is really no pastrami in sandwich_orders!')