In article <[EMAIL PROTECTED]>,
Uwe Mayer <[EMAIL PROTECTED]> wrote:
> Friday 12 August 2005 22:12 pm paolino wrote:
> [...]
> >>>>>f = open('test', 'a+')
> >>>>>f.read()
> >>
> >> ''
> >>
> >> -> append mode does not read from file, *not ok*
> >>
> >>
> > This is right IMO 'a' is appending so seek(-1)
>
> True, thank you.
> f.tell() shows the file pointer is at EOF. On my Debian Linux (unstable),
> Python 2.3.4 +2.3.5, however, the file pointer is at the beginning of the
> file.
> Is that behaviour intended?
I don't think Python pretends to have any intentions here,
it has to take what it gets from the C library fopen(3)
function. BSD man pages generally say a+ positions the
stream at end of file (period.) They claim conformance
with the ISO C90 standard. I couldn't dig up a (free) copy
of that document, so don't know what it says on this matter.
GNU C man pages say it positions the stream at end for
write and at beginning for read.
Donn Cave, [EMAIL PROTECTED]
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