python dict 常用操作
定义两个dict:
dict_a = {"A": 123, "B": 456} dict_b = {"C": 11, "A": 234}
1. 按key取交集
dict_c = {k: v for k, v in dict_a.items() if k in dict_b.keys()} print(dict_c) 结果: {‘A‘: 123}
2 按key取差集
dict_e = {k: v for k, v in dict_a.items() if k not in dict_b.keys()} print(dict_e) 结果: {‘B‘: 456}
3.按key取并集
dict_d = {**dict_a, **dict_b} print(dict_d) 结果(注意"A"的值): {‘A‘: 234, ‘B‘: 456, ‘C‘: 11}
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