[docs]
def get_activation_function(activation_char: str) -> str:
"""
Maps a VGSL activation character to the corresponding Keras activation function.
Parameters
----------
activation_char : str
The character representing the activation function in the VGSL spec.
Returns
-------
str
The name of the Keras activation function.
Raises
------
ValueError
If the provided activation character is not recognized.
Examples
--------
>>> activation = get_activation_function('r')
>>> print(activation)
'relu'
"""
activation_map = {
"s": "softmax",
"t": "tanh",
"r": "relu",
"l": "linear",
"m": "sigmoid",
}
if activation_char not in activation_map:
raise ValueError(f"Invalid activation character '{activation_char}'.")
return activation_map[activation_char]