Reverse each word in a string

Question

I am having a small problem in my code. I am trying to reverse the words and the character of a string. For example "the dog ran" would become "ehT god nar"

The code almost works. It just does not add spaces. How would you do that?

def reverseEachWord(str):
  reverseWord=""
  list=str.split()
  for word in list:
    word=word[::-1]
    reverseWord=reverseWord+word+""
  return reverseWord

"The code almost works. It just does not add spaces. How would you do that? " It's a little confusing to me how the question could have been asked. Where the original code says `reverseWord=reverseWord+word+""` - one has to wonder, what was the intended purpose of the `+""` part? Did OP try using anything else there? — Karl Knechtel, Dec 30 '22 at 00:19

score 15 · Accepted Answer · answered Dec 10 '11 at 17:30

15

You are on the right track. The main issue is that "" is an empty string, not a space (and even if you fix this, you probably don't want a space after the final word).

Here is how you can do this more concisely:

>>> s='The dog ran'
>>> ' '.join(w[::-1] for w in s.split())
'ehT god nar'

answered Dec 10 '11 at 17:30

NPE

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It doesn't work if the sentence has two spaces between the words. – Mikhail Barinov Aug 15 '21 at 13:29

score 4 · Answer 2 · answered Dec 10 '11 at 17:33

4

def reversed_words(sequence):
    return ' '.join(word[::-1] for word in sequence.split())

>>> s = "The dog ran"
>>> reversed_words(s)
... 'ehT god nar'

answered Dec 10 '11 at 17:33

Rob Cowie

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Ha. virtually identical to @aix. Beaten to it. – Rob Cowie Dec 10 '11 at 17:33
And it doesn't work for a sentence with two spaces between words as well. – Mikhail Barinov Aug 15 '21 at 13:32

score 3 · Answer 3 · answered Sep 20 '17 at 11:29

3

name=input('Enter first and last name:')
for n in name.split():
    print(n[::-1],end=' ')

answered Sep 20 '17 at 11:29

sanx84

31
1

4

In general "code only" answers are considered to be bad practice. Please open up a little bit what your code does and how it helps to solve the problem. – quinz Sep 20 '17 at 11:53

score 2 · Answer 4 · answered Apr 03 '21 at 00:12

You can also deal with noise in the string using the re module:

>>> import re
>>> s = "The \n\tdog \t\nran"
>>> " ".join(w[::-1] for w in re.split(r"\s+", s))
'ehT god nar'

Or if you don't care:

>>> s = "The dog ran"
>>> re.sub(r"\w+", lambda w: w.group(0)[len(w.group(0))::-1], s)
'Teh god nar'

score 1 · Answer 5 · answered Sep 05 '16 at 12:54

1

def reverse_words(sentence):        
     return " ".join((lambda x : [i[::-1] for i in x])(sentence.split(" ")))

answered Sep 05 '16 at 12:54

A.Raouf

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Moses Okemwa · Answer 6 · 2017-05-27T14:44:10.913

1

Another way to go about it is by adding a space to your words reverseWord=reverseWord+word+" " and removing the space at the end of your output by using .strip()

def reverse_words(str):
  reverseWord = ""
  list = str.split()
  for word in list:
    word = word[::-1]
    reverseWord = reverseWord + word + " "
  return reverseWord.strip()

check out this post on how it's used

edited May 27 '17 at 14:44

answered May 27 '17 at 14:38

Moses Okemwa

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7

score 1 · Answer 7 · edited Dec 30 '22 at 00:15

Here is a solution without using join / split :

def reverse(sentence):
    answer = ''
    temp = ''
    for char in sentence:
        if char != ' ':
            temp += char
            continue
        rev = ''
        for i in range(len(temp)):
            rev += temp[len(temp)-i-1]
        answer += rev + ' '
        temp = ''
    return answer + temp
reverse("This is a string to try")

Reverse each word in a string

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