[::-1] is an idiomatic way to reverse a string in Python that is the obvious way for a habitual user of the language to do it e.g.:

  def palindrome(s):
      return s == s[::-1]

It could be discussed whether ''.join(reversed(s)) is more readable for a novice programmer learning Python. In general, Python prefers words over punctuation.

Also, there are objects that can be reversed() that are not sequences.

http://stackoverflow.com/questions/931092/reverse-a-string-i...