字典列表转换例题

将列表list1 = [{"name": "美女", "hobby": "逛街"},

 {"name": "帅哥", "hobby": "喊麦"},

 {"name": "美女", "hobby": "唱歌"},

{"name": "帅哥", "hobby": "打游戏"}]

转换成[{'name': '美女', 'hobby_list': ['逛街', '唱歌']}, {'name': '帅哥', 'hobby_list': ['喊麦', '打游戏']}]形式

lst1 = [{"name": "美女", "hobby": "逛街"},
    {"name": "帅哥", "hobby": "喊麦"},
    {"name": "美女", "hobby": "唱歌"},
    {"name": "帅哥", "hobby": "打游戏"}]
dic = {}
for i in lst1:
    if i["name"] not in dic:
        dic[i["name"]] = [i["hobby"]]           #如果键不存在则创建一个
    else:
        dic[i["name"]] += [i["hobby"]]          #如果键已经存在了,就将新值添加上
lst =[]
for k,v in dic.items():
    dic1 = {}
    dic1["name"] = k
    dic1["hobby_list"] = v
    lst.append(dic1)
print(lst)

结果对照:

[{'name': '美女', 'hobby_list': ['逛街', '唱歌']}, {'name': '帅哥', 'hobby_list': ['喊麦', '打游戏']}]