replace string patern with different value

[Fredrik Lundh]

Bill Mill wrote:

>>>> for rep in L:
> ...     source = source.replace(token, rep, 1)

here's another way to do it:

>>> L = ["11", "22", "33"]
>>> S = "xyzzy text we've got xyzzy text xyzzy yeah yeah yeah"
>>> L.reverse()
>>> re.sub("xyzzy", lambda x: L.pop(), S)
"11 text we've got 22 text 33 yeah yeah yeah"

or, less destructive:

>>> L = ["11", "22", "33"]
>>> S = "xyzzy text we've got xyzzy text xyzzy yeah yeah yeah"
>>> re.sub("xyzzy", lambda x, pop=iter(L).next: pop(), S)

(a few more iterations of this idea and we're in python riddle country...)

</F>