How to reverse a word with slicing in python code example

Example 1: reverse string method python

#linear

def reverse(s): 
  str = "" 
  for i in s: 
    str = i + str
  return str

#splicing
'hello world'[::-1]

#reversed & join
def reverse(string): 
    string = "".join(reversed(string)) 
    return string

Example 2: python 3 slice reverse

stringname[::-1]