python, Polymorphie, attributes, setter and getter the pythonic way (V3) , Python 3

python, Polymorphie, attributes, setter and getter the pythonic way (V3)

from abc import abstractmethod

class P:
    def __init__(self, x=0):
        self.__x = x
        
    def set_x(self, x):
        self.__x = x
        
    def get_x(self):
        return self.__x
    
    
class P1:
    def __init__(self, x=0):
        self.x = x # calls the setter method not direct writing
        
    def __set_x(self, x):
        self.__x = x if x > 0 else -x
        
    def __get_x(self):
        return self.__x
    
    x = property(__get_x, __set_x) 
    
    
class P2:
    def __init__(self, x=0):
        self.x = x # self.x reference the setter method and not the attr
        
    @property
    def x(self):
        return self.__x

@x.setter
    def x(self, x):
        if x < 0:
            raise ValueError('negativ number not allowed ..warum auch immer...')
        self.__x = x

class P3:
    def __init__(self, x=0, y=0):
        #self.__x = x # we call the setter instead
        self.x = x
        #self.__y = y # we call the setter instead...
        self.y = y
    
    @property
    def x(self):
        return self.__x
    @x.setter    
    def x(self, x):
            self.__x = x if x > 0 else -x
    
    @property
    def y(self):
        return self.__y
    @y.setter
    def y(self, y):
        self.__y = y if y > 0 else -y
        
        
p30 = P3(12,14)
print(p30.x, p30.y)

p30.x = 120
p30.y = 140
print(p30.x, p30.y)
        
p30.x = -120
p30.y = -140
print(p30.x, p30.y)

p11 = P1(-15)
print('p11.x', p11.x)

p11.x = -17
print('p11.x', p11.x)
        
#p11.__set_x(-19) # not im scope like private...
#print('p11.x', p11.__get_x()) # also here...
                
        
    
p1 = P()
p2 = P(12)
print("p1.get_x(): {}, p2.get_x(): {}".format(p1.get_x(), p2.get_x()))

p21 = P2()
p22 = P2(12)
print("p21.x: {}, p22.x: {}".format(p21.x, p22.x))

try:
    p33 = P2(-14)
except ValueError as err:
    print('Error has occured:', err)
else:
    print(p33.x)
finally:
    pass

class A:
    @abstractmethod
    def m(self):
        pass
        
class B(A):
    def m(self):
        print('method m, class B')
        
class C(A):
    def m(self):
        print('method m, class C')

class D(A):
    def m(self):
        print('method m, class D')

class E:
    def m(self):
        print('method m, class E')

obj_b = B()
obj_c = C()
obj_d = D()
obj_e = E()

def m(*obj_as):
    for a in obj_as:
        if isinstance(a, A):
            a.m()
            
m(obj_b, obj_c, obj_d, obj_e)


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