marshal doesn't work with "file-like" objects

[Tim Peters]

[/F]
> Note the second part ("more of a puzzle" is a polite way to say
> "impossible, if you care about performance").

[Tim]
> That wasn't my intent ...

[/F]
> how about "impossible, if you care about performance, and
> don't want to invent yet another file format".

s/file format/filelike format/ and we're golden <wink>.