This blog introduces PyTrees — nested Python data structures (such as lists, dicts, and tuples) with numerical leaf values — designed to simplify working with complex, hierarchically organized data.
While such structures are often cumbersome to manipulate, PyTrees make them more manageable by allowing them to be flattened into a list of leaves along with a reusable structure blueprint in a
generic way.
This enables flexible, generic operations like mapping and reducing from functional programming.
By bringing those functional paradigms to structured data, PyTrees let you focus on what transformations to apply, not how to traverse the structure — no matter how deeply nested or complex it is.
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