Why does it show 122 but not 123 when printing this code(hmp)???

Question

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

Answer 1

TCorn you have defined object a twice