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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