This code defines a function called `not_mutual_friends` to compute the...

This code defines a function called not_mutual_friends to compute the list of "non-mutual" friends between two input lists, list1 and list2. In simpler terms, it finds all the elements that are present in either one of the lists but not both.

Here’s a detailed explanation of what the code does:

1. Function Definition:

   • not_mutual_friends(list1, list2) takes two lists (list1 and list2) as arguments.

2. Initialize an Empty List:

   • Creates an empty list not_mutual to hold all non-mutual elements.

3. First Loop:

   • Iterates through each name in list1.
   • If a name in list1 is not in list2, it is added to the not_mutual list.

4. Second Loop:

   • Iterates through each name in list2.
   • If a name in list2 is not in list1, it is added to the not_mutual list.

5. Return Result:

   • The not_mutual list is returned, containing names that are in one list but not the other.

6. Example Usage:

   • The function is then called with two input lists:
     • list1 = ["John", "Emma", "Mike", "Sarah"]
     • list2 = ["Emma", "Tom", "Sarah", "Peter"]
   • It computes and prints the result of the not_mutual_friends() call.

Execution:

• From list1, the names not in list2:
  • John and Mike (since Emma and Sarah are in both lists).
• From list2, the names not in list1:
  • Tom and Peter (since Emma and Sarah are in both lists).
• Combined result:
  • ["John", "Mike", "Tom", "Peter"]

Final Output:

When the code runs:

print(not_mutual_friends(list1, list2))

The output will be:

['John', 'Mike', 'Tom', 'Peter']