list comprehension

[Simon Forman]

a wrote:
> hi simon thanks for your reply

You're most welcome


> what if i want to do this
> 	        feed_list=[]
> 		feed_id=[]
> 		for ix in feeds_list_select:
> 			global feeds_list
> 			global feeds_id
> 			feeds_list.append(ix.url)
> 		       feeds_id.append(ix.id)
>
> ie not one variable but more variables
> thanks

in a case like this I would usually reach for the zip() function, with
the "varargs" * calling pattern

N = [(ix.url, ix.id) for ix in feeds_list_select]

feed_list, feed_id = zip(*N)


or just

feed_list, feed_id = zip(*[(ix.url, ix.id) for ix in
feeds_list_select])


btw, please note that the global statements in your example are
unnecessary..  *totally* unnecessary.  :-D