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fix(policy): force legacy Keras for TF >= 2.16 compatibility #514

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fix(policy): force legacy Keras for TF >= 2.16 compatibility #514

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6 changes: 6 additions & 0 deletions policy/openbot/__init__.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,11 @@
import os

# Force the legacy Keras (Keras 2) backend so this code, which targets the
# Keras 2 model API, also works on TensorFlow >= 2.16 (which switched to Keras 3
# by default and would otherwise raise "the layer ... has never been called"
# during model building). Must be set before TensorFlow is imported.
os.environ.setdefault("TF_USE_LEGACY_KERAS", "1")


def mkdir(path):
if not (os.path.exists(path)):
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