Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #63951

Re: L[:]

Show all headers | View raw

On 1/14/2014 5:42 AM, Albert-Jan Roskam wrote:

> I also found that item assignment ([1] below) is much faster
 > than using the more standard (I think) .append ([2]).

> # [1]
> for idx,item in enumerate(L[:]):
>     if some_condition:
>        L[idx] = foobarify(item)

[1] *is* the standard way to selectively replace items.

> # [2]
> L2 = []
> for idx,item in enumerate(L):
>     if some_condition:
>         L2.append(foobarify(item))
>     else:
>         L2.append(item)

-- 
Terry Jan Reedy

Back to comp.lang.python | Previous | Next | Find similar | Unroll thread

Thread

Re: L[:] Terry Reedy <tjreedy@udel.edu> - 2014-01-14 17:07 -0500

csiph-web