why though?
whats wrong with using lambda, even for simple questions?

Thanks!

Whenever i run my code it passes the Test, but on the Attempt it throws:

  File "main.py", line 2, in <module>
    import codewars_test as test
ModuleNotFoundError: No module named 'codewars_test'

Note: i added to the testcases

import codewars_test as test
from solution import flatten_and_sort

But it didnt work

Description of the kata did not state that a tuple can be passed as an argument however in the random test, a tuple was passed instead of a list.
Vector([a,b,c]) # creates a new Vector from the supplied 3D array. Vector(a,b,c) # same as above

ye i didnt know that,first time lol.
thank u

Thank you,I fixed those.

Thank you, i hope it is clearer now

thank you. I implemented random tests

yes,thank you.