tf.keras.backend.cast
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Casts a tensor to a different dtype and returns it.
tf.keras.backend.cast(
x, dtype
)
You can cast a Keras variable but it still returns a Keras tensor.
Arguments |
|---|
x
|
Keras tensor (or variable).
|
dtype
|
String, either ('float16', 'float32', or 'float64').
|
Returns |
|---|
Keras tensor with dtype dtype.
|
Examples:
Cast a float32 variable to a float64 tensor
input = tf.keras.backend.ones(shape=(1,3))
print(input)
<tf.Variable 'Variable:0' shape=(1, 3) dtype=float32,
numpy=array([[1., 1., 1.]], dtype=float32)>
cast_input = tf.keras.backend.cast(input, dtype='float64')
print(cast_input)
tf.Tensor([[1. 1. 1.]], shape=(1, 3), dtype=float64)
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Last updated 2020-10-01 UTC.
[null,null,["Last updated 2020-10-01 UTC."],[],[],null,["# tf.keras.backend.cast\n\n\u003cbr /\u003e\n\n|-------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------|\n| [TensorFlow 1 version](/versions/r1.15/api_docs/python/tf/keras/backend/cast) | [View source on GitHub](https://github.com/tensorflow/tensorflow/blob/v2.2.0/tensorflow/python/keras/backend.py#L1555-L1580) |\n\nCasts a tensor to a different dtype and returns it.\n\n#### View aliases\n\n\n**Compat aliases for migration**\n\nSee\n[Migration guide](https://www.tensorflow.org/guide/migrate) for\nmore details.\n\n[`tf.compat.v1.keras.backend.cast`](/api_docs/python/tf/keras/backend/cast)\n\n\u003cbr /\u003e\n\n tf.keras.backend.cast(\n x, dtype\n )\n\nYou can cast a Keras variable but it still returns a Keras tensor.\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n| Arguments --------- ||\n|---------|------------------------------------------------------------|\n| `x` | Keras tensor (or variable). |\n| `dtype` | String, either (`'float16'`, `'float32'`, or `'float64'`). |\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n| Returns ------- ||\n|---|---|\n| Keras tensor with dtype `dtype`. ||\n\n\u003cbr /\u003e\n\n#### Examples:\n\nCast a float32 variable to a float64 tensor \n\n input = tf.keras.backend.ones(shape=(1,3))\n print(input)\n \u003ctf.Variable 'Variable:0' shape=(1, 3) dtype=float32,\n numpy=array([[1., 1., 1.]], dtype=float32)\u003e\n cast_input = tf.keras.backend.cast(input, dtype='float64')\n print(cast_input)\n tf.Tensor([[1. 1. 1.]], shape=(1, 3), dtype=float64)"]]
TensorFlow 1 version
View source on GitHub