python字典2种的创建方法

python 字典的创建通常有2种方法

1

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

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

for key in a_dict:
    print(key)

a
c
b

2

keys=['a','b','c','d']
values=[1,2,3,4]
dictionary=(zip(keys,values))
print(dictionary)

[('a', 1), ('b', 2), ('c', 3), ('d', 4)]