change the letter string reverse oython code example

Example 1: python string reverse

'hello world'[::-1]
#  'dlrow olleh'

Example 2: 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