contrib.keras.backend.placeholder

tf.contrib.keras.backend.placeholder

tf.contrib.keras.backend.placeholder

placeholder(
    shape=None,
    ndim=None,
    dtype=None,
    sparse=False,
    name=None
)

Defined in tensorflow/contrib/keras/python/keras/backend.py.

Instantiates a placeholder tensor and returns it.

Arguments:

shape: Shape of the placeholder
    (integer tuple, may include `None` entries).
ndim: Number of axes of the tensor.
    At least one of {`shape`, `ndim`} must be specified.
    If both are specified, `shape` is used.
dtype: Placeholder type.
sparse: Boolean, whether the placeholder should have a sparse type.
name: Optional name string for the placeholder.

Returns:

Tensor instance (with Keras metadata included).

Examples:

>>> from keras import backend as K
>>> input_ph = K.placeholder(shape=(2, 4, 5))
>>> input_ph
<tf.Tensor 'Placeholder_4:0' shape=(2, 4, 5) dtype=float32>