iter(lambda:f.read(8192),'')

Gabriel Genellina gagsl-py2 at yahoo.com.ar
Tue Feb 26 04:40:29 CET 2008


En Sun, 24 Feb 2008 10:18:31 -0200, Dustan <DustanGroups at gmail.com>  
escribió:
> On Feb 24, 5:11 am, gert <gert.cuyk... at gmail.com> wrote:

>> what is the difference between iter(lambda:f.read(8192), ') and
>> iter(f.read(8192),'') ?
>
> iter(lambda:f.read(8192), '') (what you probably meant) is what it
> looks like: iter(some_func, '').

Just to make it more clear, and guessing the original context:

f = open(...)
for data in iter(lambda: f.read(8192), ''):
   do_something_with(data)

is the way to iterate over a file in blocks of 8192 bytes each.

-- 
Gabriel Genellina




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