python的三种创建字典的方法

#创建一个空字典

empty_dict = dict()

print(empty_dict)

#用**kwargs可变参数传入关键字创建字典

a = dict(one=,two=,three=)

print(a)

#传入可迭代对象

b = dict(zip(['one','two','three'],[,,]))

print(list(zip(['one','two','three'],[,,])))

print(b)

#传入可迭代对象

c = dict([('one', ), ('two', ), ('three', )])

print(c)

c1 = dict([('one', ), ('two', ), ('three', ),('three', ),('three', )])

print(c1)#如果键有重复，其值为最后重复项的值。

#传入映射对象，字典创建字典

d = dict({'one': , 'two': , 'three': })

print(d)

print(a == b == c == d)

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输出：

{}

{'one': , 'two': , 'three': }

[('one', ), ('two', ), ('three', )]

{'one': , 'two': , 'three': }

{'one': , 'two': , 'three': }

{'one': , 'two': , 'three': }

{'one': , 'two': , 'three': }

True

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