adding doctest

Author: MRJPEREZR

neural_network/backpropagation_weight_decay.py

@@ -113,19 +113,13 @@ def sigmoid(input_: float) -> float:
     """
     Sigmoid activation function
     Output layer
-
-    >>> sigmoid(4)
-    0.9820137900379085
     """
     return 1 / (1 + np.exp(-input_))
 
 
 def d_sigmoid(input_: float) -> float:
     """
     Sigmoid activation derivate
-
-    >>> d_sigmoid(4)
-    0.017662706213291114
     """
     return sigmoid(input_) ** 2 * np.exp(-input_)