Why do I get this traceback?

[Gengar]

>>> def orderize(array):
...     is_complete = False
...     i, x = 0
...     ordered_list = []
...     while not is_complete:
...             if array[i] == x:
...                     ordered_list.append(array[i])
...             if ordered_list.__len__() == 5:
...                     is_complete = True; continue
...             if i == 4:
...                     i, x = 0
...                     continue
...             i+=1
...             x+=1
... 
>>> orderize((4,3,2,1,0))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in orderize
TypeError: 'int' object is not iterable

also, why any other optimal solutions for ordering a list? noteworthy: the things getting ordered will be an object with an attribute that has the value of where it needs to be... I just noticed that this would forever loop.