试图删除重复的字典字典的值列表

Question

下面是我的字典列表:

我试图从'r_id'删除重复的值。

list_of_dict = [{'fid':200, 'r_id':['4321', '4321']}, {'fid':201, 'r_id':'5321'}]

预期输出

list_of_dict = [{'fid':200, 'r_id':['4321']}, {'fid':201, 'r_id':['5321']}]

我试过下面的代码，但不工作

for item in list_of_dict:
if type(item["record_id"]) == list:
item["record_id"] = [set(item["record_id"])]

请给我建议解决方案

Answer 1

Do:

result = [{ "fid" : d["fid"] , "r_id" : list(set(d["r_id"]))  } for d in list_of_dict]
print(result)

或简单的:

for d in list_of_dict:
d["r_id"] = list(set(d["r_id"]))
print(list_of_dict)

如果你真的需要检查类型，使用isinstance:

for d in list_of_dict:
if isinstance(d["r_id"], list):
d["r_id"] = list(set(d["r_id"]))

有关Python中检查类型的规范方法，请阅读此

Answer 2

如果在item['r_id']中您有另一个类似str的类型，您可以尝试:

list_of_dict = [{'fid':201, 'r_id':'5321'}, {'fid':200, 'r_id':['4321', '4321']}]
for item in list_of_dict:
if type (item['r_id']) == list:
# if isinstance(item['r_id'],list):
item['r_id'] = list(set(item['r_id']))
elif type (item['r_id']) == str:
# elif isinstance(item['r_id'],str):
item['r_id'] = [item['r_id']]
#Shortest approach
>>> [{'fid' : item['fid'], 'r_id' : list(set(item['r_id'])) if type(item['r_id']) == list else [item['r_id']]} for item in list_of_dict]
[{'fid': 201, 'r_id': ['5321']}, {'fid': 200, 'r_id': ['4321']}]

Answer 3

你就快成功了!虽然可能有其他(更好的)解决方案，但如果您将其更改如下，您的解决方案也将有效:

for item in list_of_dict:
if type(item["r_id"]) == list:
item["r_id"] = list(set(item["r_id"]))

Answer 4

try this:

for items in list_of_dict:
temp_list = list()
if isinstance(item["r_id"], list):
for value in item["r_id"]:
if value not in templist:
temp_list.append(value)
item["r_id"] = temp_list