python dictionary 생성하기

[방법1]

dict_a = {'a': 1, 'b': 2, 'c': 3}

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[방법2]

dict_a = dict(a = 1, b = 2, c = 3)

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[방법3]

dict_a = dict([('a', 1), ('b', 2), ('c', 3)])