How to del item of a list in loop?

[John Machin]

skull wrote:
> According to Nick's article, I added three 'reversed' methods to your
provided
> test prog. and the result turned out method_reversed is faster than
others except  the 'three' case.
> Following is my modified version:
[snip]
> def method_reversed_idx(lst):
>     idx = 0
>     for i in reversed(lst):
>         if i == 2:
>             del lst[idx]
>         idx += 1

There appears to be a problem with this one:

>>> def method_reversed_idx(lst):
...     idx = 0
...     for i in reversed(lst):
...         if i == 2:
...             del lst[idx]
...         idx += 1
...
>>> lst=[1,2,3];method_reversed_idx(lst);print lst
[1, 3]
>>> lst=[2,1,3];method_reversed_idx(lst);print lst
[2, 1]
>>> lst=[1,3,2];method_reversed_idx(lst);print lst
[3]
>>>