Hi everyone,

inheriting a class attribute from a super class and later changing the value for the subclass works fine:

class Unit(object):
    value = 10

class Archer(Unit):
    pass

print Unit.value
print Archer.value

Archer.value = 5

print Unit.value
print Archer.value

leads to the output:
10
10
10
5
which is just fine: Archer inherits the value from Unit, but when I change Archer's value, Unit's value remains untouched.

Now, if the inherited value is a list, the shallow copy effect strikes and the value of the superclass is also affected:

class Unit(object):
    listvalue = [10]

class Archer(Unit):
    pass

print Unit.listvalue
print Archer.listvalue

Archer.listvalue[0] = 5

print Unit.listvalue
print Archer.listvalue

Output:
10
10
5
5

Is there a way to "deep copy" a list when inheriting it from the super class?

Many thanks
Sano