GNU bug report logs - #60545
Keras h5py Version Mismatch

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Andreas Enge <andreas <at> enge.fr>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#60545: closed (Keras h5py Version Mismatch)
Date: Sat, 12 Jul 2025 10:44:03 +0000

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Your message dated Sat, 12 Jul 2025 12:43:31 +0200
with message-id <aHI8U8xi7UeZRFQi <at> jurong>
and subject line Close
has caused the debbugs.gnu.org bug report #60545,
regarding Keras h5py Version Mismatch
to be marked as done.

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help-debbugs <at> gnu.org.)


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From: Zacchaeus Scheffer <Zacchaeus.Scheffer <at> synaptics.com>
To: "bug-guix <at> gnu.org" <bug-guix <at> gnu.org>
Subject: Keras h5py Version Mismatch
Date: Wed, 4 Jan 2023 01:37:34 +0000

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Hi Guix!


It would seem that the current keras version expects an earlier h5py version for loading models.  Specifically, running:

from tensorflow.keras.models import load_model
model = load_model("model.h5")

fails with:

  File "/gnu/store/idfn4l2kxil9id21v1yci4jcw6103fah-profile/lib/python3.9/site-packages/tensorflow/python/keras/engine/saving.py", line 228, in load_model
    model_config = json.loads(model_config.decode('utf-8'))
AttributeError: 'str' object has no attribute 'decode'

The above works fine in my local pip environment (see below).  A quick search online indicates that this can be fixed by downgrading h5py to version 2.10.  The current h5py version in guix is 3.6.

My assumption is that this could also be fixed with an upgrade to keras, but upgrading keras sounds much more involved.  For a short-term fix, would it be possible to add back a package definition for an earlier h5py in addition to the current version?  I'm sure an appropriate version exists somewhere in guix's git history, though my git-foo is too weak for me to check.


Thanks,
Zacchae


P.S.
working (pip): keras 2.10.0, h5py 3.7.0
not working (current guix): keras 2.2.4, h5py 3.6.0

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From: Andreas Enge <andreas <at> enge.fr>
To: 60545-done <at> debbugs.gnu.org
Subject: Close
Date: Sat, 12 Jul 2025 12:43:31 +0200

Closing this, as we have moved on to newer versions.
If you still see problems, please open an issue on codeberg.

Andreas

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