class_docstr: Applies an Exponential Linear Unit function to an output.
  
  Formula:
  
  ```
  f(x) = alpha * (exp(x) - 1.) for x < 0
  f(x) = x for x >= 0
  ```
  
  Args:
      alpha: float, slope of negative section. Defaults to `1.0`.
      **kwargs: Base layer keyword arguments, such as `name` and `dtype`.
code: def compute_output_shape(self, input_shape):
      return input_shape
  
file_path: keras/keras/layers/activations/elu.py
imports: from keras import activations
  from keras.api_export import keras_export
  from keras.layers.layer import Layer
label_desc: Use image node_id 3 for calling the ELU obj's underlying member method code with example usage: obj.compute_output_shape(input_shape) and returns: input_shape