Home Original page

stdio EOF ?

DIG dig.list at telkel.net
Fri Aug 9 18:55:40 EDT 2002 
Hi, Erik Max Francis !

 On Fri, Aug 09, 2002 at 03:34:37PM -0700, Erik Max Francis wrote:

> Francois Pinard wrote:
> 
> > I did not read the thread.  I merely replied to the message saying
> > that:
> > 
> > > > > The standard idiom [...] is:
> 	...
> 
> Note that the part you elided here was "for this," not "for reading a
> file in general."  I was talking about the standard idiot for doing
------------------------------------------------------^^^^^

idiom ?
~~~~~

> interactive line-by-line reading.
> 
> > As long as you keep to a single "for line in file.xreadlines():" or
> > "for line in file:", is there a problem associated with the buffering?
> > I'm merely curious, here...
> 
> It is not necessarily a problem, unless you want line-by-line
> interactivity.  In 
> 
> 	for line in file.readlines():
> 	    ...
> 
> all of the lines are read in at once and then iterated over.  This means
> that you have to wait for the entire input file to finish before any
> processing starts.  With 
> 
> 	for line in file.xreadlines():
> 	    ...
> 
> the .xreadlines method returns a special object which acts the same way
> but reads the file in chunks -- but still not line by line.  If you want
> line-by-line interactively, these mechanics are not what you want.
> 
> -- 
>  Erik Max Francis / max at alcyone.com / http://www.alcyone.com/max/
>  __ San Jose, CA, US / 37 20 N 121 53 W / ICQ16063900 / &tSftDotIotE
> /  \ There is nothing so subject to the inconstancy of fortune as war.
> \__/ Miguel de Cervantes
>     Church / http://www.alcyone.com/pyos/church/
>  A lambda calculus explorer in Python.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> __________
> 1OUTaTaeO sDODia, D YOUTaTaeO YOa - http://www.newhost.ru


Regards,

-- 
DIG (Dmitri I GOULIAEV)
More information about the Python-list mailing list