【面向对象】-类和对象作业

1.类或对象是否可以做字典得key，可以但是不推荐

class Person():
    pass

dic={Person():123}

print(dic)
私有成员是如何实现的：改名策略

# 作业

# 1.类或对象是否能做字典的key 可以,不推荐
"""
class Person():
pass
dic = {Person():123}
print(dic)
"""
# 2.简述python的私有成员是如何实现的 _改名策略
# 3.私有成员能在类的外部使用么?能在子类中使用么? 都不行
# 4.读程序写结果.(不执行)
class StarkConfig(object):
def __init__(self,num):
self.num = num
def changelist(self,request):
print(self.num,request)

class RoleConfig(StarkConfig):
def changelist(self,request):
print('666')

# 创建了一个列表,列表中有三个对象(实例)
config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
for item in config_obj_list:
print(item.num) # 1 2 3

# 5.读程序写结果.(不执行)
class StarkConfig(object):
def __init__(self,num):
self.num = num
def changelist(self,request):
print(self.num,request)

class RoleConfig(StarkConfig):
pass

# 创建了一个列表,列表中有三个对象(实例)
config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
for item in config_obj_list:
item.changelist(168)
"""
1 168
2 168
3 168
"""
# print(config_obj_list[0].num)

# 6.读程序写结果.(不执行)
class StarkConfig(object):
def __init__(self,num):
self.num = num
def changelist(self,request):
print(self.num,request)

class RoleConfig(StarkConfig):
def changelist(self,request):
print(666,self.num)

config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
for item in config_obj_list:
item.changelist(168)
"""
1 168
2 168
666 3
"""

# 7.读程序写结果.(不执行)
class StarkConfig(object):
def __init__(self,num):
self.num = num
def changelist(self,request):
print(self.num,request)
def run(self):
self.changelist(999)

class RoleConfig(StarkConfig):
def changelist(self,request):
print(666,self.num)

config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
config_obj_list[1].run() # 2 999
config_obj_list[2].run() # 666 , 3

# 8.读程序写结果.(不执行)
class StarkConfig(object):
def __init__(self,num):
self.num = num
def changelist(self,request):
print(self.num,request)
def run(self):
self.changelist(999)

class RoleConfig(StarkConfig):
def changelist(self,request):
print(666,self.num)

class AdminSite(object):
def __init__(self):
self._registry = {}
def register(self,k,v):
self._registry[k] = v

site = AdminSite()
print(len(site._registry)) # 0
site.register('range',666) # {range:666}
site.register('shilei',438)# {range:666 , shilei:438}
print(len(site._registry)) # 2

site.register('lyd',StarkConfig(19))# {lyd:obj}
site.register('yjl',StarkConfig(20))# {yjl:obj}
site.register('fgz',RoleConfig(33)) # {fgz:obj}
print(len(site._registry)) # 5
print(site._registry)

# 9.读程序写结果.(不执行)
class StarkConfig():
def __init__(self,num):
self.num = num
def changelist(self,request):
print(self.num,request)
def run(self):
self.changelist(999)

class RoleConfig(StarkConfig):
def changelist(self,request):
print(666,self.num)

class AdminSite():
def __init__(self):
self._registry = {}
def register(self,k,v):
self._registry[k] = v

site = AdminSite()
site.register('lyd',StarkConfig(19))
site.register('yjl',StarkConfig(20))
site.register('fgz',RoleConfig(33))
"""
'lyd': <__main__.StarkConfig object at 0x0000029289477F28>,
'yjl': <__main__.StarkConfig object at 0x0000029289477F60>,
"""
for k,row in site._registry.items():
row.changelist(5) # 19 5 / 20 5 / 666 33
for k,row in site._registry.items():
row.run() # 19 999 / 20 999 / 666 33
""""""

# 10.读程序写结果.(不执行)
class JustCounter:
__secretCount = 0
def count(self):
print(self.__secretCount) # 获取
self.__secretCount += 1
"""
self.__secretCount = self.__secretCount + 1
self.__secretCount = 0 + 1 = 1
self.__secretCount = 1 为当前对象添加私有成员__secretCount 值为1
"""

def count3():
print(JustCounter.__secretCount)
JustCounter.__secretCount += 1
print(JustCounter.__secretCount)

class Bars(JustCounter):
def count2(self):
print(self.__secretCount)

# 情况一
""""""
# counter1 = JustCounter()
# counter1.count() # 0
# counter1.count() # 1
# JustCounter.count3() # 1

"""
0
1
"""
# 情况二
# counter2 = Bars()
# counter2.count() # 1
# counter2.count() # 2
# 情况三
# JustCounter.count3() # 0 1