dictionary 键、值 映射列表 1.27

1. 定义

if __name__ == '__main__':    dict1 = {'ni':0,'hao':1}    print(dict1)

{‘hao’: 1, ‘ni’: 0}

1. 增加、更新 新内容

#2. 增加、更新  新内容    dict1['ma'] = '2'    print(dict1)    dict1['ma'] = '3'    print(dict1)

{‘ni’: 0, ‘hao’: 1, ‘ma’: ‘2’}
{‘ni’: 0, ‘hao’: 1, ‘ma’: ‘3’}