class Person():
  #構(gòu)造方法
  def __init__(self):
    print("構(gòu)造函數(shù)被執(zhí)行了")
  #創(chuàng)建對(duì)象的過程中構(gòu)造函數(shù)被自動(dòng)調(diào)用
p1 = Person()

class Person():
  #一般情況下,構(gòu)造方法的參數(shù)和成員變量有關(guān),并且在設(shè)置的過程中與成員變量同名
  def __init__(self, name, age, height, weight):
    #print(nname, age, height, weight)
    #因?yàn)闃?gòu)造方法是創(chuàng)建對(duì)象的過程中被調(diào)用的
    #所以構(gòu)造方法的作用一般是用來定義成員變量并且給成員變量賦值
    #定義屬性并給屬性賦值
    #通過self來進(jìn)行區(qū)分是成員變量還是形參
    self.name = name
    self.age = age
    self.height = height
    self.weight = weight
  def run(self):
    print("run")
  def eat(self, food):
    print("eat "+ food)
'''
構(gòu)造函數(shù): __init__() 在使用類創(chuàng)建對(duì)象的時(shí)候自動(dòng)調(diào)用
注意: 如果不顯式的寫出構(gòu)造函數(shù),默認(rèn)會(huì)自動(dòng)添加一個(gè)空的構(gòu)造函數(shù),函數(shù)體中什么都不實(shí)現(xiàn)
'''
per = Person("hanmeimei", 20, 170, 55)
print(per.name, per.age)
per.run()
per2 = Person("lili", 21, 175, 70)
print(per2.name, per2.age)

class Test():
  def prt(self):
    print(self)
    print(self.__class__)
t = Test()
t.prt()

class Person():
  def run(self):
    print("run")
    print(self.__class__)
    p = self.__class__("tt", 30, 10, 30)
  def eat(self,food):
    print("eat" + food)
  def say(self):
    print("hello, my name is %s, I am %d year old" % (self.name, self.age))
  def play(a):
    print("play", a.name)
  def __init__(self, name, age, height, weight):
    self.name = name
    self.age = age
    self.height = height
    self.weight = weight
# self代表此時(shí)正在創(chuàng)建對(duì)象,self.屬性表示當(dāng)前對(duì)象的屬性
per1 = Person("tom", 20, 160, 80)
per1.say()
per2 = Person("henmeimei", 21, 160, 80)
per2.say()
per1.say()
per1.run()

class Person():
  def run(self):
    print("run")
  def eat(self, food):
    print("eat "+food)
  def __init__(self, name, age, height, weight):
    self.name = name
    self.age = age
    self.height = height
    self.weight = weight
   def __del__(self):
    print("析構(gòu)函數(shù)被調(diào)用了")
per = Person("hanmeimei", 20, 170, 55)
#釋放對(duì)象
del per
#注意:對(duì)象釋放后就不能再進(jìn)行訪問了
#在函數(shù)里定義的對(duì)象,會(huì)在函數(shù)結(jié)束時(shí)自動(dòng)釋放,這樣可以用來減少內(nèi)存空間的浪費(fèi)
#其實(shí)就是作用域的問題
def func():
  per2 = Person("aa", 1, 1, 1)
func()

class Animal(object):
  def __del__(self):
    print('Animal父類的析構(gòu)函數(shù)被調(diào)用了')
class Cat(Animal):
  pass
cat = Cat()

class A():
  def __init__(self):
    print("父類A構(gòu)造函數(shù)被調(diào)用了")
  def __del__(self):
    print("父類A析構(gòu)函數(shù)被調(diào)用了")
class B(A):
  def __init__(self):
    print("子類B構(gòu)造函數(shù)被調(diào)用了")
    A.__init__(self)
  def __del__(self):
    print("子類B析構(gòu)函數(shù)被調(diào)用了")
class C(A):
  pass
def main():
  b = B()
  del b
  print("*********************")
  c = C()
if __name__ == '__main__':
  main()