using struct module on a file

[Simon Forman]

On Wed, Nov 18, 2009 at 11:42 AM, Ulrich Eckhardt <doomster at knuut.de> wrote:
> Hia!
>
> I need to read a file containing packed "binary" data. For that, I find the
> struct module pretty convenient. What I always need to do is reading a chunk
> of data from the file (either using calcsize() or a struct.Struct instance)
> and then parsing it with unpack(). For that, I repeatedly write utility
> functions that help me do just that, but I can't imagine that there is no
> better way for that.
>
> Questions:
> 0. Am I approaching this from the wrong direction? I'm not a programming
> noob, but rather new to Python still.
> 1. The struct module has pack_into() or unpack_from(), could I somehow
> combine that with a file?
> 2. Is there some easier way to read files? I know about array and xdrlib,
> but neither really fit my desires.
> 3. Failing all that, would you consider this a useful addition to the struct
> module, i.e. should I write a feature request?
>
> Thanks!
>
> Uli

You might look at "Construct":

http://construct.wikispaces.com/

~Simon