what's the python for this C statement?
Lie Ryan
lie.1296 at gmail.com
Mon Oct 20 13:01:13 EDT 2008
On Mon, 20 Oct 2008 12:34:11 +0200, Hrvoje Niksic wrote:
> Michele <michele at nectarine.it> writes:
>
>> Hi there,
>> I'm relative new to Python and I discovered that there's one single way
>> to cycle over an integer variable with for: for i in range(0,10,1)
>
> Please use xrange for this purpose, especially with larger iterations.
> range actually allocates a sequence.
Actually that doesn't really matter unless the loop is extremely big (> a
million), since range is much faster than xrange for smaller values
(which might be the more typical case). And I think range will be an
iterator in the future, imitating the behavior of xrange. So it doesn't
really matter anyway.
>> However, how this C statement will be translated in Python?
>>
>> for (j = i = 0; i < (1 << H); i++)
>
> If H doesn't change during the loop, you can use:
>
> j = 0
> for i in xrange(1 << H):
> ...
>
> If H can change, simply rewrite it into an obvious 'while' loop.
I would suggest a different thing: rewrite it in python instead of
translating it.
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