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| Date | Wed, 23 Jan 2013 17:17:45 -0600 |
| From | Evan Driscoll <driscoll@cs.wisc.edu> |
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| To | Coolgg <gauravj123@gmail.com> |
| Subject | Re: Arent these snippets equivalent? |
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On 01/23/2013 03:56 PM, Coolgg wrote:
> Is this:
>
> while True:
> data = fp.read(4096)
> if not data:
> break
> ...
>
> not equivalent to this:
>
> data = fp.read (4096)
> while data:
> ...{handle the chunk here}
> data = fp.read (4096)
>
> Heres the article that sparked this question:
> http://wordaligned.org/articles/pythons-lesser-known-loop-control
There is at least one potentially-critical difference: what happens if
there is a 'continue' statement in the "..." part. The upper loop will
set data again, while the lower one will not.
So if what you mean is "are they equivalent no matter what legal Python
code you put in the ...", no, they aren't.
Evan
Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread
Arent these snippets equivalent? Coolgg <gauravj123@gmail.com> - 2013-01-23 13:56 -0800
Re: Arent these snippets equivalent? John Gordon <gordon@panix.com> - 2013-01-23 22:06 +0000
Re: Arent these snippets equivalent? Chris Angelico <rosuav@gmail.com> - 2013-01-24 09:13 +1100
Re: Arent these snippets equivalent? Roy Smith <roy@panix.com> - 2013-01-23 17:47 -0500
Re: Arent these snippets equivalent? Tim Chase <python.list@tim.thechases.com> - 2013-01-23 17:29 -0600
Re: Arent these snippets equivalent? Chris Angelico <rosuav@gmail.com> - 2013-01-24 10:29 +1100
Re: Arent these snippets equivalent? Terry Reedy <tjreedy@udel.edu> - 2013-01-23 21:38 -0500
Re: Arent these snippets equivalent? Coolgg <gauravj123@gmail.com> - 2013-01-23 21:01 -0800
Re: Arent these snippets equivalent? Coolgg <gauravj123@gmail.com> - 2013-01-23 21:01 -0800
Re: Arent these snippets equivalent? Evan Driscoll <driscoll@cs.wisc.edu> - 2013-01-23 17:17 -0600
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