python的三種創建字典的方法

#創建一個空字典
empty_dict = dict() 
print(empty_dict)

#用**kwargs可變參數傳入關鍵字創建字典
a = dict(one=1,two=2,three=3) 
print(a)

#傳入可迭代對象
b = dict(zip(['one','two','three'],[1,2,3]))
print(list(zip(['one','two','three'],[1,2,3])))
print(b)

#傳入可迭代對象 
c = dict([('one', 1), ('two', 2), ('three', 3)])
print(c)

c1 = dict([('one', 1), ('two', 2), ('three', 3),('three', 4),('three', 5)])
print(c1)#如果鍵有重復，其值為最后重復項的值。 


#傳入映射對象，字典創建字典  
d = dict({'one': 1, 'two': 2, 'three': 3}) 
print(d) 

print(a == b == c == d)
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輸出：

{}
{'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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