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  • 数据类型转化

    列表 与 字典

    一、dict & list

    1、字典转化为列表

    遍历索引,遍历元素

    lst2 = {'perms': [{'db': 'merchant', 'db_name': 'csprd', 'perms': 'QUERY'},
                      {'db': 'oversea', 'db_name': 'prd', 'perms': 'QUERY'},
                      {'db': 'bidding', 'db_name': 'pre', 'perms': 'QUERY'},
                      {'db': 'order', 'db_name': 'perf', 'perms': 'QUERY'}],
        'username': '夜铭',
        'role': ['USER'],
        'env': 'product'}
    # 带参数1,取消默认索引从0开始
    for p, s in enumerate(lst2, 1):
        # p 是索引号
        # s 是字典的key
        # lst2[s] 是字典的value
        print([s, lst2[s]])
    

    out:

    ['perms', [{'db': 'merchant', 'db_name': 'csprd', 'perms': 'QUERY'}, {'db': 'oversea', 'db_name': 'prd', 'perms': 'QUERY'}, {'db': 'bidding', 'db_name': 'pre', 'perms': 'QUERY'}, {'db': 'order', 'db_name': 'perf', 'perms': 'QUERY'}]]
    ['username', '夜铭']
    ['role', ['USER']]
    ['env', 'product']
    

    2、多个列表合并并转化为字典

    dbs = ['merchant', 'order', 'bidding', 'payment', 'marketing']
    owns = ['lucy', 'mike', 'john', 'sihye', 'jack']
    sexs = ['g', 'b', 'b', 'b', 'g']
    
    grou = dict()
    for db, own, sex in zip(dbs, owns, sexs):
        grou.setdefault(db, {}).update({own: sex})
    pprint(grou)
    

    grou out:

    {'bidding': {'john': 'b'},
     'marketing': {'jack': 'g'},
     'merchant': {'lucy': 'g'},
     'order': {'mike': 'b'},
     'payment': {'sihye': 'b'}}
    
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  • 原文地址:https://www.cnblogs.com/sihye/p/13255143.html
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