Setting up our global priors

foo.py

import pymc3 as pm

with pm.Model() as model:
    global_m = pm.Normal('global_m', mu=0, sd=100**2)
    global_m_sd = pm.Uniform('global_m_sd', lower=0, upper=1000)
    global_b = pm.Normal('global_b', mu=0, sd=100**2)
    global_b_sd = pm.Uniform('global_b_sd', lower=0, upper=1000)
    
    degree_m = pm.Normal('degree_m', mu=global_m, sd=global_m_sd, shape=degree_count)
    degree_m_sd = pm.Uniform('degree_m_sd', lower=0, upper=1000, shape=degree_count)
    degree_b = pm.Normal('degree_b', mu=global_b, sd=global_b_sd, shape=degree_count)
    degree_b_sd = pm.Uniform('degree_b_sd', lower=0, upper=1000, shape=degree_count)