?

[Geoffrey Clements]

"urikaluzhny" <ukaluzhny at nds.com> wrote in message 
news:51e0f25d-474a-450a-ad00-92f70c893c6c at m44g2000hsc.googlegroups.com...
On May 15, 10:06 am, "Terry Reedy" <tjre... at udel.edu> wrote:
> "urikaluzhny" <ukaluz... at nds.com> wrote in message
>
> news:f8229614-a000-450e-85eb-825e6c1386cf at w7g2000hsa.googlegroups.com...
> | It seems that I rather frequently need a list or iterator of the form
> | [x for x in <> while <>]
>
> I can think of two ways to interpret that.
>> I mean like [x for x in <A> if <B>], only that it breaks the loop when
>> the expression <B> is false.

def gen(a):
    for x in a:
        if B: break
        yield x

a_gen = gen(A)

# now iterate over a_gen

-- 
Geoff