How to reverse a string in Python on a word-by-word basis?

Question

How to reverse each word in a sentence without affecting special characters in Python?

Suppose input:

" Hi, I am vip's "

Output should be like:

" iH, I ma piv's"

score 1 · Answer 1 · answered Feb 02 '20 at 15:36

1

One approach, using re.sub with a callback function:

inp = " Hi, I am vip's "
output = re.sub(r'\w+', lambda x: x.group(0)[len(x.group(0))::-1], inp)
print(inp)
print(output)

This prints:

 Hi, I am vip's 
 iH, I ma piv's

answered Feb 02 '20 at 15:36

Tim Biegeleisen

1

`[::-1]` will do just fine as a slice expression… – deceze Feb 02 '20 at 15:39
@deceze Well it looks like you've _sliced_ through my answer quite well `:-)` – Tim Biegeleisen Feb 02 '20 at 15:39

score 1 · Answer 2 · edited Feb 02 '20 at 15:40

1

Try this:

>> strung = 'this is my string'
>> ' '.join(x[::-1] for x in strung.split())
'siht si ym gnirts'

edited Feb 02 '20 at 15:40

OneCricketeer

answered Feb 02 '20 at 15:39

CezarySzulc

2 Answers2