Reverse the words in a string

Tactic:

1. reverse the whole string
2. reverse every word on its own

Code:

s="The goal is to make a thin circle of dough, with a raised edge."

r=' '.join([ w[::-1] for w in s[::-1].split(' ')  ]) 

The notation s[::-1] is called extended slice syntax, and should be read as [start:end:step] with the start and end left off.

Note: you also have the reversed() function, which returns an iterator:

s='circumference'
''.join(reversed(s))

'ecnerefmucric'