python对象（一）init方法，__str__方法简单使用

class Cat:

def__init__(self,name,age):

self.name = name

self.age = age

#魔术方法，妈的，优达的课真JB坑，这都不讲,类似java toString方法

def__str__(self):

return"姓名：%s年龄：%d"% (self.name,self.age)

defeat(self):

print("cat eat shit")

defdrink(self):

print("cat drink shit")

defintroduce(this):

"""方法的第一个参数都指向本对象自身，可以叫任何名字，默认self"""

print("%s的年龄是%d"% (this.name,this.age))

# tom = Cat()

# tom.drink()

# tom.eat()

# tom.name = "tom"  #居然可以在没有定义属性的时候直接给属性赋值

# tom.age = 23

# tom.introduce()

tom = Cat("lanmao",33)

# tom.introduce()

print(tom)

#============================================================================================

class SweetPotato:

def__init__(self):

self.cookedString ="生的"

self.cookedLevel =0

self.smell = []

def__str__(self):

return"地瓜状态:%s(%d)味道是：%s"% (self.cookedString,

self.cookedLevel,str(self.smell))

defcook(self,cook_time):

self.cookedLevel += cook_time

ifself.cookedLevel >=0andself.cookedLevel <3:

self.cookedString ="生的"

elifself.cookedLevel >=3andself.cookedLevel <5:

self.cookedString ="半生不熟"

elifself.cookedLevel >=5andself.cookedLevel <8:

self.cookedString ="熟了"

else:

self.cookedString ="胡了"

defaddCondiments(self,flavor):

self.smell.append(flavor)

digua = SweetPotato()

digua.cook(1)

print(digua)

digua.cook(1)

print(digua)

digua.cook(1)

digua.addCondiments("屎")

print(digua)

digua.cook(1)

print(digua)

digua.cook(1)

print(digua)

digua.cook(1)

digua.addCondiments("姜")

print(digua)

digua.cook(1)

print(digua)

digua.cook(1)

print(digua)