tf.keras.backend.cast

TensorFlow 1 version View source on GitHub

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

    import tensorflow as tf 
    from tensorflow.keras import backend as K 
    input = K.ones(shape=(1,3)) 
    print(input) 
    cast_input = K.cast(input, dtype='float64') 
    print(cast_input) 
     
        <tf.Variable 'Variable:0' shape=(1, 3) dtype=float32, 
             numpy=array([[1., 1., 1.]], dtype=float32)> 
        tf.Tensor([[1. 1. 1.]], shape=(1, 3), dtype=float64)