有没有办法在字典中索引嵌套列表？ PYTHON

Question

I have a dictionary like such:

dict = {"TestA" : [[1,2,3],[4,5,6]], "TestB" : [[7,8,9],[10,11,12]]}

When I try to run the code ahead to create a single line string, I get an error ValueError: too many values to unpack (expected 2)

key, val = list(dict.items())[0][0]
cooltest = str(key) + str (val)

I sort of understand why I get the error (because there are 2 "variables" expected, which are key and value, and instead it gets more than 2). However, as seen, I have indexed to the integer 1, so my val should be 1 and my key should be TestA. Is it even possible to index a nested list that's inside a dictionary? Thank you for your time and your advice, in advance!

Edit: Solution is to just use two different methods (.keys and.values) rather than just using.items

Answer 1

First of all following code gives me an error.

dict = {TestA : [1,2,3],[4,5,6], TestB : [7,8,9],[10,11,12]}

I'll assume what you have wanted is

dict = {"TestA": [[1,2,3],[4,5,6]], "TestB": [[7,8,9],[10,11,12]]}

Also, list(dict.items()) is equal to [('TestA', [[1, 2, 3], [4, 5, 6]]), ('TestB', [[7, 8, 9], [10, 11, 12]])] . Therefore, list(dict.items())[0][0] is a string, which would cause a error in your code. It is likely what you want is list(dict.items())[0][1] which is equal to [[1, 2, 3], [4, 5, 6]] .