A specific example of my question is, \"How can I get \'3210\' in this example?\"
>>> foo = \'0123456\' >>> foo[0:4] \'0123\' >>> foo[::-1] \'6543210\' >>>
Simply exclude the end range index...
>>> foo[3::-1] '3210'
Ironically, about the only option I think you didn't try.