Initialize the pending count for ops between two lists of Operations. 'pending_count[op]' indicates the number of backprop inputs to this operation. Args: to_ops: list of Operations. from_ops: list of Operations. colocate_gradients_with_ops: Python bool. See docstring of gradien
(to_ops, from_ops, colocate_gradients_with_ops, func_graphs,
xs_set)
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