activation_function.py

import math

# Better activation function
def take_umbrella(input_1, input_2, w_1=1.0, w_2=1.0):
    '''Let input_1 be a probability between 0.0 and 1.0
    with 0.0 meaning no chance of rain and 1.0 meaning 100%
    chance of rain.

    Let input_2 be a time duration describing minutes spent
    outdoors.'''
    input_2 = input_2/1440
    activation = (w_1*input_1 + w_2*input_2) / (w_1 + w_2)
    activation = math.tanh(activation)

    return activation