Python反轉字典的key和value

1.遍歷

m = {'a': 1, 'b': 2, 'c': 3}
n = {}
for k, v in m.items():
    n[v] = k
print(n)

2.字典推導式

m = {'a': 1, 'b': 2, 'c': 3}
n = {v: k for k, v in m.items()}
print(n)

3.使用zip函數

m = {'a': 1, 'b': 2, 'c': 3}
n = dict(zip(m.values(), m.keys()))
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print(n)

4.結合map和reversed函數

m = {'a': 1, 'b': 2, 'c': 3}
n = dict(map(reversed, m.items()))
print(n)