Python object-oriented private properties

__init__ constructor function

Self.name = Name  # property, instance variable, member variable, field

def sayhi () # method, dynamic property

Private properties do not see the  front plus __

classRole ():#Pass Parameters    def __init__(self,name,role,weapon,life_value=100,moneny=15000):        #constructor Function        #initialization of some classes during instantiationSelf.name =name Self.role=role Self.weapon=Weapon Self.life_value=Life_value Self.moneny=Moneny self.__heart='Normal'   #Private Properties    defShot (self):#method of the class, function (dynamic property)        Print("shotting")    defGot_shot (self):Print("on,%s got shoot ..."%self.name)defBuy_gun (self,gun_name):Print("%s just bought%s"%(self.name,gun_name)) Self.weapon=Gun_nameb1= Role ('Mike','Police','AK47')Print(B1.name)Print(B1.__heart)#private properties are not public" "Miketraceback (most recent): File "c:/users/administrator/pycharmprojects/ss/sss/day6/private attribute 1.py", line + <module> Print (b1.__heart) Attributeerror: ' Role ' object has no attribute ' __heart '" "

Used in internal methods

classRole ():#Pass Parameters    def __init__(self,name,role,weapon,life_value=100,moneny=15000):        #constructor Function        #initialization of some classes during instantiationSelf.name =name Self.role=role Self.weapon=Weapon Self.life_value=Life_value Self.moneny=Moneny self.__heart='Normal'   #Private Properties    defShot (self):#method of the class, function (dynamic property)        Print("shotting")        Print("Private Properties", self.__heart) self.__heart='dddd'        Print("Private Properties", self.__heart)    defGot_shot (self):Print("on,%s got shoot ..."%self.name)defBuy_gun (self,gun_name):Print("%s just bought%s"%(self.name,gun_name)) Self.weapon=Gun_nameb1= Role ('Mike','Police','AK47')Print(B1.shot ())" "shotting Private Property normal private property Ddddnone" "

If you want to force external access

classRole ():#Pass Parameters    def __init__(self,name,role,weapon,life_value=100,moneny=15000):        #constructor Function        #initialization of some classes during instantiationSelf.name =name Self.role=role Self.weapon=Weapon Self.life_value=Life_value Self.moneny=Moneny self.__heart='Normal'   #Private Properties    defShot (self):#method of the class, function (dynamic property)        Print("shotting")        Print("Private Properties", self.__heart) self.__heart='dddd'        Print("Private Properties", self.__heart)    #define a method for external access    defShow_heart (self):returnSelf.__heart    defGot_shot (self):Print("on,%s got shoot ..."%self.name)defBuy_gun (self,gun_name):Print("%s just bought%s"%(self.name,gun_name)) Self.weapon=Gun_nameb1= Role ('Mike','Police','AK47')Print(B1.show_heart ())#Normal

Force access to private properties

classRole ():#Pass Parameters    def __init__(self,name,role,weapon,life_value=100,moneny=15000):        #constructor Function        #initialization of some classes during instantiationSelf.name =name Self.role=role Self.weapon=Weapon Self.life_value=Life_value Self.moneny=Moneny self.__heart='Normal'   #Private Properties    defShot (self):#method of the class, function (dynamic property)        Print("shotting")    defGot_shot (self):Print("on,%s got shoot ..."%self.name)defBuy_gun (self,gun_name):Print("%s just bought%s"%(self.name,gun_name)) Self.weapon=Gun_nameb1= Role ('Mike','Police','AK47')#force access to private propertiesPrint(B1._role__heart) B1._role__heart#Normal

Private property Inheritance refactoring method cannot access private properties of parent class

classFoo (object):def __init__(self, name): Self.__name=namedefF1 (self):Print(self.)__name)classBar (Foo):defF2 (self):Print(self.)__name) obj= Bar ("Mike") obj.f2 ()" "Traceback (most recent): File "c:/users/administrator.qh-20170325tnqr/pycharmprojects/sssss/ss/day7/ S13 Object-oriented/private property inheritance 1.py ", line, in <module> obj.f2 () File" C:/users/administrator.qh-20170325tnqr/pycharmproject S/sssss/ss/day7/s13 Object-oriented/private property inheritance 1.py ", line F2 print (self.__name) Attributeerr

Only the parent class can access it

classFoo (object):def __init__(self, name): Self.__name=namedefF1 (self):Print(self.)__name)classBar (Foo):defF2 (self):Print(self.)__name) obj= Bar ("Mike") obj.f1 ()#Mike

Python object-oriented private properties