Python 3.2.3 (default, Feb 20 2013, 14:44:27) 
[GCC 4.7.2] on linux2
Type "copyright", "credits" or "license()" for more information.
>>> def do_something_to_this_list(the_list):
    for i in range(len(the_list)):
        the_list[i] = the_list[i]**2

        
>>> do_something_to_this_list([1, 2, 3, 4, 5])
>>> def do_something_to_this_list(the_list):
    for i in range(len(the_list)):
        the_list[i] = the_list[i]**2
    return the_list

>>> do_something_to_this_list([1, 2, 3, 4, 5])
[1, 4, 9, 16, 25]
>>> def do_something_else_to_this_list(the_list):
    for i in range(len(the_list)):
        print(the_list[i])

        
>>> do_something_else_to_this_list([1, 2, 3, 4, 5])
1
2
3
4
5
>>> def do_something_else_to_this_list(the_list):
    for i in the_list:
        print(i)

        
>>> do_something_else_to_this_list([1, 2, 3, 4, 5])
1
2
3
4
5
>>>