To do it the way you're trying to do it, use this:
>>> num = 0
>>> mylist = 
>>> while num < 10:
... num += 1
... mylist += [num]
>>> for item in mylist:
... print item
Notice I put brackets around num since you have to add a list to a list when using the + operator. Other methods would be to use mylist.append(num) or mylist.insert(index, num) . I also changed your x = x + y statements to x += y , which is identical.
"I'm not getting it to print anything! I'll post the exact code I am working with... I'm trying to convert from deci to binary and print the binary number using the list method."
so you're trying to convert a number from decimal to binary??
here's a hint how to do that :)