# tensorflow::ops::DynamicPartition Class Reference

# tensorflow::ops::DynamicPartition

`#include <data_flow_ops.h>`

Partitions `data` into `num_partitions` tensors using indices from `partitions`.

## Summary

For each index tuple `js` of size `partitions.ndim`, the slice `data[js, ...]` becomes part of `outputs[partitions[js]]`. The slices with `partitions[js] = i` are placed in `outputs[i]` in lexicographic order of `js`, and the first dimension of `outputs[i]` is the number of entries in `partitions` equal to `i`. In detail,


```
    outputs[i].shape = [sum(partitions == i)] + data.shape[partitions.ndim:]
```

<br />


```
    outputs[i] = pack([data[js, ...] for js if partitions[js] == i])
```

<br />

`data.shape` must start with `partitions.shape`.

For example:


```
    # Scalar partitions.
    partitions = 1
    num_partitions = 2
    data = [10, 20]
    outputs[0] = []  # Empty with shape [0, 2]
    outputs[1] = [[10, 20]]
```

<br />


```
    # Vector partitions.
    partitions = [0, 0, 1, 1, 0]
    num_partitions = 2
    data = [10, 20, 30, 40, 50]
    outputs[0] = [10, 20, 50]
    outputs[1] = [30, 40]
```

<br />

See `dynamic_stitch` for an example on how to merge partitions back.


![](https://www.tensorflow.org/static/versions/r2.3/api_docs/cc/images/DynamicPartition.png)

<br />

Arguments:

- scope: A [Scope](https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope) object
- partitions: [Any](https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/ops/any#classtensorflow_1_1ops_1_1_any) shape. Indices in the range `[0, num_partitions)`.
- num_partitions: The number of partitions to output.

<br />

Returns:

- `OutputList`: The outputs tensor.

<br />

| ### Constructors and Destructors ||
|---|---|
| `https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/ops/dynamic-partition#classtensorflow_1_1ops_1_1_dynamic_partition_1a3054ef5ab4e012816521a61a98ff1cb8(const ::https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope & scope, ::https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input data, ::https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input partitions, int64 num_partitions)` ||

| ### Public attributes ||
|---|---|
| `https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/ops/dynamic-partition#classtensorflow_1_1ops_1_1_dynamic_partition_1ae34cf25c6a4f479e6eab33dd8d6c7bca` | `https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/operation#classtensorflow_1_1_operation` |
| `https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/ops/dynamic-partition#classtensorflow_1_1ops_1_1_dynamic_partition_1ac93870bad9fb8ccd554d368930d608c0` | `::https://www.tensorflow.org/versions/r2.3/api_docs/cc/group/core#group__core_1gab449e6a3abd500c2f4ea93f9e89ba96c` |

| ### Public functions ||
|---|---|
| `https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/ops/dynamic-partition#classtensorflow_1_1ops_1_1_dynamic_partition_1a69567b14d471387c73d2e2240c59d645(size_t index) const ` | `::https://www.tensorflow.org/versions/r2.3/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output` |

## Public attributes

### operation

```
Operation operation
```

### outputs

```
::tensorflow::OutputList outputs
```

## Public functions

### DynamicPartition

```
 DynamicPartition(
  const ::tensorflow::Scope & scope,
  ::tensorflow::Input data,
  ::tensorflow::Input partitions,
  int64 num_partitions
)
```

### operator\[\]

```
::tensorflow::Output operator[](
  size_t index
) const 
```