from math import exp
z = [-1.0, 1.0, 5.0]
exp(z[0])
0.36787944117144233
exp(z[1])
2.718281828459045
exp(z[2])
148.4131591025766
total = exp(z[0]) + exp(z[1]) + exp(z[2])
total
151.49932037220708
exp(z[0])/total
0.0024282580295913376
exp(z[1])/total
0.017942534803329194
exp(z[2])/total
0.9796292071670795