Python 从字典中获取/转换嵌套列表中的值？

Question

I'm trying to convert values in nested list from dict:

list1 =  [["a","b"],["c"],["a","d"]]
dict1 = {"a":1,"b":2,"c":3,"d":4}

resultant_output

new_list = [[1,2],[3],[1,4]]

Answer 1

You can do it with list comprehension, assuming the values of list1 exist in dict1

new_list = [[dict1[v] for v in k] for k in list1]

Answer 2

You can try this:-

res = [[dict1[i] for i in j] for j in list1]
print(res)

Output:-

[[1, 2], [3], [1, 4]]