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    ·2úh  ã                   @   s8   d dl mZ d dlmZ eddgƒG dd„ deƒƒZdS )é    )Úkeras_export)ÚBasePoolingzkeras.layers.AveragePooling1Dzkeras.layers.AvgPool1Dc                       s*   e Zd ZdZ				d‡ fdd„	Z‡  ZS )ÚAveragePooling1Da‚
  Average pooling for temporal data.

    Downsamples the input representation by taking the average value over the
    window defined by `pool_size`. The window is shifted by `strides`.  The
    resulting output when using "valid" padding option has a shape of:
    `output_shape = (input_shape - pool_size + 1) / strides)`

    The resulting output shape when using the "same" padding option is:
    `output_shape = input_shape / strides`

    Args:
        pool_size: int, size of the max pooling window.
        strides: int or None. Specifies how much the pooling window moves
            for each pooling step. If None, it will default to `pool_size`.
        padding: string, either `"valid"` or `"same"` (case-insensitive).
            `"valid"` means no padding. `"same"` results in padding evenly to
            the left/right or up/down of the input such that output has the same
            height/width dimension as the input.
        data_format: string, either `"channels_last"` or `"channels_first"`.
            The ordering of the dimensions in the inputs. `"channels_last"`
            corresponds to inputs with shape `(batch, steps, features)`
            while `"channels_first"` corresponds to inputs with shape
            `(batch, features, steps)`. It defaults to the `image_data_format`
            value found in your Keras config file at `~/.keras/keras.json`.
            If you never set it, then it will be `"channels_last"`.

    Input shape:

    - If `data_format="channels_last"`:
        3D tensor with shape `(batch_size, steps, features)`.
    - If `data_format="channels_first"`:
        3D tensor with shape `(batch_size, features, steps)`.

    Output shape:

    - If `data_format="channels_last"`:
        3D tensor with shape `(batch_size, downsampled_steps, features)`.
    - If `data_format="channels_first"`:
        3D tensor with shape `(batch_size, features, downsampled_steps)`.

    Examples:

    `strides=1` and `padding="valid"`:

    >>> x = np.array([1., 2., 3., 4., 5.])
    >>> x = np.reshape(x, [1, 5, 1])
    >>> avg_pool_1d = keras.layers.AveragePooling1D(pool_size=2,
    ...    strides=1, padding="valid")
    >>> avg_pool_1d(x)

    `strides=2` and `padding="valid"`:

    >>> x = np.array([1., 2., 3., 4., 5.])
    >>> x = np.reshape(x, [1, 5, 1])
    >>> avg_pool_1d = keras.layers.AveragePooling1D(pool_size=2,
    ...    strides=2, padding="valid")
    >>> avg_pool_1d(x)

    `strides=1` and `padding="same"`:

    >>> x = np.array([1., 2., 3., 4., 5.])
    >>> x = np.reshape(x, [1, 5, 1])
    >>> avg_pool_1d = keras.layers.AveragePooling1D(pool_size=2,
    ...    strides=1, padding="same")
    >>> avg_pool_1d(x)
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