If I have a class, and two instances of it:
class Foo:
var = 1
a = Foo()
b = Foo()
Both of the instances' var attributes reflect the value I will set for Foo:
Foo.var = 2
print(a.var) # 2
print(b.var) # 2
But when I then set var for just a, a.var isn't anymore "in sync" with Foo.var:
a.var = 3
Foo.var = 4
print(a.var) # 3
print(b.var) # 4
Can I somehow "revert" this without creating a new instance so that a.var will once again reflect the value of Foo.var?
The obvious attempt doesn't (obviously) work, since integers are not references:
a.var = Foo.var
print(a.var) # 4
Foo.var = 5
print(a.var) # 5
The instance attribute can just be deleted and then a will once again use the var defined in Foo:
del a.var
Foo.var = 6
print(a.var) # 6