You should uncommented and use below.
# weibull1 = pm.Weibull.dist(alpha=shape1, beta=scale1)
# weibull2 = pm.Weibull.dist(alpha=shape2, beta=scale2)
You should uncommented and use below.
# weibull1 = pm.Weibull.dist(alpha=shape1, beta=scale1)
# weibull2 = pm.Weibull.dist(alpha=shape2, beta=scale2)