Move Item to front of list when using for in loop

cclloyd :

What would be the most pythonic way to move an item to the front of a list, when iterate through the list with a for in loop?

As such:

for item in items:
    if condition:
        # Move `item` to front of `items`
        break

Sayandip Dutta :

Modifying a list while iterating over it, is generally not recommended, that said:

>>> ctr = 0
>>> lst = [1,2,3,4,5,6]
>>> for i in lst:
...:     if ctr == 3:
...:         lst.insert(0,lst.pop(ctr))
...:         break
...:     ctr += 1
...:
>>> lst
[4, 1, 2, 3, 5, 6]

Or,

>>> lst = [1,2,3,4,5,6]
>>> for i,x in enumerate(lst):
...     if x == 3:
...         lst.insert(0,lst.pop(i))
...         break
>>> lst
[3, 1, 2, 4, 5, 6]