34 lines
540 B
Python
34 lines
540 B
Python
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# 我们有两个字典如下:
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a = {
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"x":1,
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"y":2,
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"z":3
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}
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b = {
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"w":10,
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"x":11,
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"y":12
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}
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# 如果想要得到相同处,只需要用keys和items这类可迭代方法执行集合操作就行
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# 大家都有
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print(a.keys() & b.keys())
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# a有b没有
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print(a.keys() - b.keys())
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# b有a没有
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print(b.keys() - a.keys())
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# 想快速给a减键,可以这样:
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c = {key:a[key] for key in a.keys() - {"w", "z"}}
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print(c)
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# python3.9更新了使用|的字典合并和与+=一样的合并运算符|=
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d = a
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d |= b
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print(d)
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