Is it possible to let a virtual file created by cStringIO have a filename so that functions can read it by its filename?

[Chris Rebert]

On Fri, Jan 14, 2011 at 7:52 AM, Cun Zhang <apzc2529 at gmail.com> wrote:
> Hi,all
> I hope use cStringIO to create virtual file, but my customed function which
> is from a shared library imported by ctypes
> just accepts a filename(string type) as parameter.
>
> So I'm wondering whether there is any method that make the virtual file
> created by cStringIO like a normal file which have
> a filename, so it can be called by my functions.

That's not possible. (c)StringIO presents a file-like interface at the
Python level, but under the covers, it's not implemented using
anything like a normal file; thus, it doesn't have a presence on any
filesystem. I would suggest using a temporary file
(http://docs.python.org/library/tempfile.html ) for communicating with
the C module, writing the contents of the StringIO object to the
temporary file if necessary.
(It's probably also possible to hack something together with FUSE, but
it'd be a slow, platform-specific kludge.)

Cheers,
Chris
--
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