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Use jax.tree_util.treedef_is_leaf for readability #128

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Use jax.tree_util.treedef_is_leaf for readability #128

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3 changes: 1 addition & 2 deletions penzai/core/tree_util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -49,8 +49,7 @@ def tree_flatten_exactly_one_level(
paths_and_subtrees, treedef = jax.tree_util.tree_flatten_with_path(
tree, is_leaf=lambda subtree: subtree is not tree
)
leaf_treedef = jax.tree_util.tree_structure(1)
if treedef == leaf_treedef:
if jax.tree_util.treedef_is_leaf(treedef):
return None

keys_and_subtrees = [
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