Python list append causes strange result

Question

I have really strange problem. Here is the sample code:

class SomeClass(object):
    a = []
    b = []
    def __init__(self, *args, **kwargs):
        self.a =          


        

Answer 1

dicts in python share the same memory space when you assign them to each other.

for more information on this see: http://henry.precheur.org/python/copy_list