Is there a way to append to a list WITHOUT modifying the parameter passed?

[arnavb]

Let's say I have this code:

def test(some_args):
    some_args += ['two']

args = ['one']
test(args)
print(args)

When I run this code, the output is:

Output:
['one', 'two']

Is there a way to append to a list WITHOUT an in-place assignment which modifies the parameter itself? I've tried .append('two'), but that doesn't work either. I realize that I can just make a copy of the list using .copy() or with slice notation, but I want to avoid creating an extra variable just for this purpose.