demo_python_class_7.py:
​x
 
class Person:
  def __init__(self, name, age):
    self.name = name
    self.age = age
​
  def myfunc(self):
    print("Hello my name is " + self.name)
​
p1 = Person("Bill", 63)
​
del p1.age
​
print(p1.age)
​
C:\Users\My Name>python demo_python_class_7.py
Traceback (most recent call last):
  File "demo_class7.py", line 13, in <module>
    print(p1.age)
AttributeError: 'Person' object has no attribute 'age'