CODEWITHSUNDEEP
python-3.x
Caleb Dimenstein
Caleb Dimenstein

Reputation: 19

Python3 reversing an inputed sentence

I am trying to create a function that reverses a sentence that a user inputs but when I run the program I am not getting the sentence in reverse. Bellow is my code

sentence=input('Enter a sentence: ')

def sentence_reverse(sentence):
    words=sentence.split()
    newsentence=words.reverse()
    return (newsentence)

print(sentence_reverse(sentence))

Upvotes: 0

Views: 69

Answers (5)

Andreas
Andreas

Reputation: 2521

Welcome to StackOverflow!

The reason is because you are using split() but it does not convert your input string into the list of its character. It just make a list with one element, which is your input string. Instead, convert the string to list using list() function, and then convert it back to string using join() function. In addition to that, reverse() returns nothing. So, you have to returns the words variable instead.

sentence=input('Enter a sentence: ')

def sentence_reverse(sentence):
    words=list(sentence)
    words.reverse()
    return ''.join(words)

print(sentence_reverse(sentence))

Upvotes: 0

Akhilesh Pandey
Akhilesh Pandey

Reputation: 896

Here is a simplest way to solve your problem:

sentence=input('Enter a sentence: ')

def sentence_reverse(sentence):
    words= sentence.split() # breaks the sentence into words
    rev_sentence= ''
    for word in words:
        rev_sentence = ' ' + word + rev_sentence
    return rev_sentence

print(sentence_reverse(sentence))

Input: Hi please reverse me

Ouput: me reverse please Hi

Hope this helps you. Kindly let me know if anything else is needed.

Upvotes: 0

Sari Masri
Sari Masri

Reputation: 226

def sentence_reverse(s):
    return ' '.join(s.split()[::-1])

print(sentence_reverse(sentence))

Upvotes: 1

Loocid
Loocid

Reputation: 6441

reverse() is an in-place operation, meaning it reverses words itself and doesnt return anything. So instead of returning newsentence, you want to return words like so:

sentence=input('Enter a sentence: ')

def sentence_reverse(sentence):    
    words=sentence.split()
    words.reverse()
    return words

print(sentence_reverse(sentence))

>>>Enter a sentence: hello world
>>>['world', 'hello']

Upvotes: 0

Sari Masri
Sari Masri

Reputation: 226

you can do this

 def reverse(s):
    if len(s) == 0:
        return s
    else:
        return reverse(s[1:]) + s[0]

or :

def reverse2(s):
    return s[::-1]

Upvotes: 0

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