Python 类和对象，烤地瓜案例

#coding= utf-8
class SweetPotato:
def __init__(self):
self.cookedLevel = 0
self.cookedString = "生的"
self.condiments = []
def cook(self,time):
self.cookedLevel += time
if self.cookedLevel > 8:
self.cookedString = "烤焦了"
elif self.cookedLevel > 5:
self.cookedString = "烤熟了"
elif self.cookedLevel > 3:
self.cookedString = "半生不熟"
else:
self.cookedString = "生的"
def addCondiments(self,addWhat):
self.condiments.append(addWhat)

#重点：一定要先判断大于8，再判断是否大于5，再判断大于3，如果不这样的话，反过来，程序会满足多个if
def __str__(self):
msg = "地瓜的生熟程度为：" + self.cookedString
msg += ",等级为" + str(self.cookedLevel)
if len(self.condiments)>0:
msg += ",加了这些佐料："
for condiment in self.condiments:
msg += condiment + "," 
#msg = msg[:-1]
msg = msg.strip(",")
else:
msg+= "，请添加调料"
return msg
xiaodigua = SweetPotato()
xiaodigua.cook(1)
print(xiaodigua)
xiaodigua.cook(1)
print(xiaodigua)
xiaodigua.cook(1)
print(xiaodigua)
xiaodigua.cook(1)
print(xiaodigua)
xiaodigua.cook(1)
print(xiaodigua)
xiaodigua.cook(1)

xiaodigua.addCondiments("番茄酱")
print(xiaodigua)
xiaodigua.addCondiments("芥末酱")
print(xiaodigua)
xiaodigua.addCondiments("咖喱")
print(xiaodigua)
xiaodigua.addCondiments("孜然")

print(xiaodigua)