Is This Code Ok? How Can I Avoid Using Global Variables?

[digitalmatic7]

def test():
 return [1, 2, 3, 4, 5]
 
 
def test2():
    return [6, 7, 8, 9, 10]
 

def test3():
    return [11, 12, 13, 14, 15]


final_list = test1() + test2() + test3()
print()
print(final_list)

I appreciate the help once again, DeaD_EyE !

I think I understand 'return' well enough to use it in my projects now.

Part of my confusion was passing multiple objects into a single return, then combining them outside the function, but it seems easy in this case (multiple lists I want to combine). I'm still not 100% sure how to return different object types, like for example a string and a list through return, because then it's like they're combined into a single variable when you call the function.

Is the rule to only return 1 kind of data per function?

def test1():

    link_list1 = [1, 2, 3, 4, 5]
    link_list2 = [6, 7, 8, 9, 10]
    link_list3 = [11, 12, 13, 14, 15]

    return link_list1 + link_list2 + link_list3


def test2():

    link_list4 = [16, 17, 18, 19, 20]
    link_list5 = [21, 22, 23, 24, 25]
    link_list6 = [26, 27, 28, 29, 30]

    return link_list4 + link_list5 + link_list6


final_list = test1() + test2()
print()
print(final_list)

This forum is the best, its helped me overcome all the brick walls I've hit so far, you guys are amazing.