字典创建方式_字典建立

1

2

3

>>> dic = {}

>>> type(dic)

<type 'dict'>

1

2

3

>>> dic = {'spam':1, 'egg':2, 'bar':3}

>>> dic

{'bar': 3, 'egg': 2, 'spam': 1}

1

2

3

>>> dic = dict(spam = 1, egg = 2, bar =3)

>>> dic

{'bar': 3, 'egg': 2, 'spam': 1}

1

2

3

4

>>> list = [('spam', 1), ('egg', 2), ('bar', 3)]

>>> dic = dict(list)

>>> dic

{'bar': 3, 'egg': 2, 'spam': 1}

1

2

3

>>> dic = dict(zip('abc', [1, 2, 3]))

>>> dic

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

1

2

3

>>> dic = {i:2*i for i in range(3)}

>>> dic

{0: 0, 1: 2, 2: 4}

1

2

3

>>> dic = dict.fromkeys(range(3), 'x')

>>> dic

{0: 'x', 1: 'x', 2: 'x'}

1

2

3

4

>>> list = ['x', 1, 'y', 2, 'z', 3]

>>> dic = dict(zip(list[::2], list[1::2]))

>>> dic

{'y': 2, 'x': 1, 'z': 3}