python 字典取并集

master_node = {
    '1': ['a', 'd'],
    '2': ['a', 'd'],
    '4': ['a', 'd']}

agent_dict = {
    '2': ['b', 'f'],
    '3': ['b', 'f'],
    '4': ['b', 'f'],
}

agent_dict = {**master_node, **agent_dict }

print(agent_dict)