eof

[braver]

On Nov 22, 3:41 am, Wayne Brehaut <wbreh... at mcsnet.ca> wrote:
> If you have PythonWin 2.5.1 (r251:54863, May  1 2007, 17:47:05) [MSC v.1310
> 32 bit (Intel)] on win32.for example, using Help, Index, eof gives:
>
> eof
> Token used to determine end of file. This will be set to the empty
> string (''), in non-POSIX mode, and to None in POSIX mode. New in
> version 2.3.
>
> If you don't use Active State Python--and even of you do--it helps to
> have these  three "official" references handy:
> If the end of the file has been reached, f.read() will return an empty
> string ("").
>
> 3.9 File Objects
>
> There, and checking for "EOF"  you'll note that both read( [size]) and
> readline( [size]) include:
>
> "An empty string is returned only when EOF is encountered
> immediately."
>
> HTH?

Nope!  I don't want to buffer input myself, and don't want to store
look-ahead and push it back.  f.read()/readline() is not a non-
destructive check, and thus won't do.

> >In Ruby it's f.eof:
>
> It also is not nice to talk Ruby here--nor Perl. Refer to C/C++ if
> necessary.

Well folks compare scripting languages all the time, and surely Ruby
is closer to Python than C++.  Since Ruby can do f.eof, which is
easily found in its references, and Python can't, or its EOF can't
easily be found -- the one *equivalent* to a semantically clear
Ruby's, or Pascal's IIRC, f.eof -- something's missing here...

Why do I have to count sizes of lines read and compare it to some
filesize or do other weird tricks just to see, in a way not changing
my input stream, whether it's at the, well, EOF?

Cheers,
Alexy