python - 从具有重复键的字典列表中创建具有唯一键的字典列表

Question

我有一个字典列表:

records = [{id:123, name:'Course A', enrolled_date:'1st Feb'}, 
           {id:123, name:'Course A', enrolled_date:'1st Jan'},
           {id:456, name:'Course B', enrolled_date:'1st Jan'}]

我想根据这些数据创建一个新的词典列表。新列表应仅包含在该列表范围内具有唯一 ids 的字典，例如:

new_records = [{id:123, name:'Course A'}, 
               {id:456, name:'Course B'}]

这是我到目前为止尝试过的代码。这显然不起作用 - 但我已尽一切努力来纠正它。

new_records = []

for record in records: 
    new_id = record['id']
    new_name = record['name'] 
    new_dict = {'id':new_id, 'name',new_name}
    If new_id not in new_records:
        new_records.append(new_dict)

Answer 1

这是基于您提供的代码，但对于大型列表来说，它的运行速度非常慢，如其他评论中所述。

new_records = []

for record in records: 
    new_id = record['id'] 
    new_name = record['name'] 
    new_dict = {'id':new_id, 'name': new_name}
    if not any(new_record['id'] == new_id for new_record in new_records):
        new_records.append(new_dict)