Combining two lists while removing duplicates in the new list and keeping duplicates in original list returns a list of containing all of the values in the first list and all unique values in the second that are not in the first. For example, combining [1, 2, 2, 3,] and [3, 4] with these conditions will return [1, 2, 2, 3, 4].
Solution for How to combine two lists while removing duplicates in the new list and keeping duplicates in original list in Python : You can use set() and list() to combine two lists while removing duplicates in the new list and keeping duplicates in original list Call set(list_1) and set(list_2) to generate sets of the elements in list_1 and list_2 respectively which contain no duplicates.
Call list(set_2 – set_1) to generate a list of elements in list_2 that are not in list_1.
Add the original list, list_1, to the result of the previous step, list_2_items_not_in_list_1 to return a combined list.
