Re: Problems using struct pack/unpack in files, and reading them.

From	Ian Kelly <ian.g.kelly@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: Problems using struct pack/unpack in files, and reading them.
Date	2015-11-13 14:00 -0700
Message-ID	<mailman.306.1447448484.16136.python-list@python.org> (permalink)
References	<20151113192045.GA9913@z-sverige.nu> <CALwzidnL1N8efgJfM-EKTgqzmDjg2QwcZVVmDXJB2_QGyFnExA@mail.gmail.com> <20151113201510.GA10107@z-sverige.nu>

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On Fri, Nov 13, 2015 at 1:15 PM, kent nyberg <kent@z-sverige.nu> wrote:
> Even with that, it still gets wrong.
> I also tried .read()[RegisterAX:RegisterAX+4]

When you call read for the second time, are you just reading the same
file again without closing or seeking it in the interim? If that's the
case, then you would get an empty string the second time, which would
explain your error.

Either retain the read data between calls, or call seek(0) before
reading it again.

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Re: Problems using struct pack/unpack in files, and reading them. Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-13 14:00 -0700
  Re: Problems using struct pack/unpack in files, and reading them. Grant Edwards <invalid@invalid.invalid> - 2015-11-13 21:17 +0000
    Re: Problems using struct pack/unpack in files, and reading them. kent nyberg <kent@z-sverige.nu> - 2015-11-13 16:34 -0500
      Re: Problems using struct pack/unpack in files, and reading them. Grant Edwards <invalid@invalid.invalid> - 2015-11-13 21:44 +0000

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