小编Tor*_*den的帖子

朋友们,我有一个词典列表:

my_list = 
[
{'oranges':'big','apples':'green'},
{'oranges':'big','apples':'green','bananas':'fresh'},
{'oranges':'big','apples':'red'},
{'oranges':'big','apples':'green','bananas':'rotten'}
]

我想创建一个新的列表,消除部分重复.

在我的情况下,必须删除这本词典:

{'oranges':'big','apples':'green'}

,因为它复制了较长的词典:

{'oranges':'big','apples':'green','bananas':'fresh'}
{'oranges':'big','apples':'green','bananas':'rotten'}

因此,期望的结果:

[
{'oranges':'big','apples':'green','bananas':'fresh'},
{'oranges':'big','apples':'red'},
{'oranges':'big','apples':'green','bananas':'rotten'}
]

怎么做？太感谢了!

我有两张桌子:items和orders

items
--------------
id (int) | type_1 (int) | type_2  (int)|

orders
--------------
id (int) | transaction_type enum ('type_1', 'type_2')

基本上,我想做以下事情:

select (select transaction_type from orders where id=1) from items;

所以,问题是string返回的select transaction_type from orders where id=1,不能转换成列名.

朋友,基本上,我想采取一个字典:

fruit_dict = {'oranges':['big','small'],'apples':['green','yellow','red']}

并通过在不同键的所有值之间进行所有可能的排列来获得以下字典列表:

output_list = 
[
{'oranges':'big','apples':'green'},
{'oranges':'big','apples':'yellow'},
{'oranges':'big','apples':'red'},
{'oranges':'small','apples':'green'},
{'oranges':'small','apples':'yellow'},
{'oranges':'small','apples':'red'}
]

怎么做？太感谢了!