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=1,two=2,three=3) 
print(a)

#传入可迭代对象
b = dict(zip(['one','two','three'],[1,2,3]))
print(list(zip(['one','two','three'],[1,2,3])))
print(b)

#传入可迭代对象 
c = dict([('one', 1), ('two', 2), ('three', 3)])
print(c)

c1 = dict([('one', 1), ('two', 2), ('three', 3),('three', 4),('three', 5)])
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': 1, 'two': 2, 'three': 3}) 
print(d) 

print(a == b == c == d)
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输出：

{}
{'one': 1, 'two': 2, 'three': 3}
[('one', 1), ('two', 2), ('three', 3)]
{'one': 1, 'two': 2, 'three': 3}
{'one': 1, 'two': 2, 'three': 3}
{'one': 1, 'two': 2, 'three': 5}
{'one': 1, 'two': 2, 'three': 3}
True
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