graph = [('AAGE', ['ACLSWKR', 'ADTIND']), ('ARACE', ['AAGE'])]

node = graph[0]
this = node[0]
parents = node[1]
cpd[this] = pd.pivot_table(df, index=parents, values='COPY',
                               columns=[this], fill_value=0,
                                aggfunc=[np.sum])