Help me to solve the code #0001

Question

#help in in this code i don't understand

class MyClass():
n = 0
def __init__(self) :
MyClass.n += 1
def __del__(self) :
MyClass.n -= 1
a = MyClass()
print(a.n)
b = MyClass()
print(b.n)
a = MyClass()
print(a.n)

""" this code gives output
1
2
2
i don't understand how..? """

Answer 1

line 11 : as the variable a is reassigned, the object created line 7 gets de-referenced so __del__ is called and n is decremented.
Then as a new object is created the __init__ function is called and n is incremented again.

Answer 2

Before the second a = MyClass() goes and executes __init__, the existing a is deleted calling __del__.