code: def tree_unflatten(
      leaves: Iterable[Any], treespec: TreeSpec
  ) -> PyTree:
      """Reconstruct a pytree from the treespec and the leaves.
  
      The inverse of :func:`tree_flatten`.
  
      >>> tree = {'b': (2, [3, 4]), 'a': 1, 'c': None, 'd': 5}
      >>> leaves, treespec = tree_flatten(tree)
      >>> tree == tree_unflatten(leaves, treespec)
      True
  
      Args:
          leaves (iterable): The list of leaves to use for reconstruction. The list must match the
              number of leaves of the treespec.
          treespec (TreeSpec): The treespec to reconstruct.
  
      Returns:
          The reconstructed pytree, containing the ``leaves`` placed in the structure described by
          ``treespec``.
      """
      if not isinstance(treespec, TreeSpec):
          raise TypeError(
              f"tree_unflatten(values, spec): Expected `spec` to be instance of "
              f"TreeSpec but got item of type {type(treespec)}."
          )
      return optree.tree_unflatten(treespec, leaves)
  
imports: import functools
  import warnings
  from typing import Any, Callable, Iterable, List, Optional, overload, Tuple, Type, TypeVar, Union
  import torch
  import optree
  from optree import PyTreeSpec
label_desc: Use image node_id 6 for calling a global function with example usage: tree_unflatten(leaves, treespec) and returns: optree