Python question w.r.t init

Question

Why is the output 122?

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

Credit to Javier.I. Rivera R. for the question :)

Answer 1

n is a class variable. It isn't connected to the instances, but to the class. Each time a new class instance is created, __init__(self) is called and the counter is increased by one. Each time an instance is deleted, n is decreased by one, meaning that m.n effectively counts how many instances of m() exist. The variable a is declared twice, meaning that the former instance of m() is deleted and a new instance is created at the same moment. That's why the counter stays at 2 (instead of rising to 3).

Answer 2

Yes

Answer 3

Just to confirm, now there will be one instance of both a and b right?