根据嵌套键的值拆分嵌套字典

Question

I have a nested dictionary that I would like to split based on the value of end qty . I would like to only keep keys in which 'end qty' == 0 . I believe it can be done easily with dictionary comprehension, but I can't quite get it right.

import datetime
d = {
    'ID1' : {'start qty': 13 , 'end qty': 40},
    'ID2' : {'start qty': 10 , 'end qty': 0},
    'UD3' : {'start qty': 30 , 'end qty': 30},
    'ID4' : {'start qty': 20 , 'end qty': 0},
}    

print { k:v for k, v in d.items() if ['end qty'] == 0 }

Answer 1

尝试以下这一行：

print { k:v for k, v in d.items() if v['end qty'] == 0 }

Answer 2

只需以这种方式在print语句中添加v

print { k:v for k, v in d.items() if v['end qty'] == 0 }