A transformation that groups elements and performs a reduction.
tf.data.experimental.group_by_reducer(
key_func, reducer
)
This transformation maps element of a dataset to a key using key_func and
groups the elements by key. The reducer is used to process each group; its
init_func is used to initialize state for each group when it is created, the
reduce_func is used to update the state every time an element is mapped to
the matching group, and the finalize_func is used to map the final state to
an output value.
Args |
|---|
key_func
|
A function mapping a nested structure of tensors
(having shapes and types defined by self.output_shapes and
self.output_types) to a scalar tf.int64 tensor.
|
reducer
|
An instance of Reducer, which captures the reduction logic using
the init_func, reduce_func, and finalize_func functions.
|
View source on GitHub