expression in an if statement

[John Nagle]

On 8/18/2010 11:24 AM, ernest wrote:
> Hi,
>
> In this code:
>
> if set(a).union(b) == set(a): pass
>
> Does Python compute set(a) twice?

    CPython does.  Shed Skin might optimize.  Don't know
about Iron Python.

					John Nagle