Best way to loop over a python string backwards
Here is a way to reverse a string without utilizing the built in features such as reversed. Negative step values traverse backwards.
def reverse(text): rev = '' for i in range(len(text), 0, -1): rev += text[i-1] return rev
reversed takes an iterable and and returns an iterator that moves backwards. string[::-1] is fine, but it creates a new, reversed string instead. If you just want to iterate, then this will probably better:
for c in reversed(string): print cIf you want to use the reversed string afterwards, creating it once will be better.