Python reverse-stride slicing

Question

A specific example of my question is, \"How can I get \'3210\' in this example?\"

>>> foo = \'0123456\'
>>> foo[0:4]
\'0123\'
>>> foo[::-1]
\'6543210\'
>>>          


        

Answer 1

Omit the end index in your slice notation:

>>> foo = '0123456'
>>> foo[3::-1]
'3210'

If you have to do this many times, create a slice object that you can use over and over

>>> i = slice(3,None,-1)
>>> foo[i]
'3210'