CODEWITHSUNDEEP
python
user12270
user12270

Reputation:

Single word Palindrome Checker (True or False)

Right now, what I have is a code that I can test a single word whether it is a Palindrome or not. I have to input the word, and it will tell me whether it is a Palindrome (True) or if it is not (False)

I need to create one that Asks for a single word, then provides a True of False based on the word that is typed. This is what i have so far.

I really have no idea how to do this, any help would be greatly appreciated. 

def isPalindrome(s):
   if len(s) <= 1:
       return True
   else:
       if s[0] != s[len(s)-1]:
           return False
       else:
           return isPalindrome(s[1:len(s)-1])
print(isPalindrome("poop"))

Upvotes: 2

Views: 27397

Answers (10)

stephenmuss
stephenmuss

Reputation: 2445

Simply create a reversed string and check if both are equal.

def isPalindrome(s):
    return s == s[::-1]

print(isPalindrome('poop'))

Upvotes: 20

Ruben
Ruben

Reputation: 187

For the people doing the palindrome test from testdome.com that takes into account casing, here is my solution:

def is_palindrome(word):

wordoriginal = []
wordreversed = []

for i in reversed(word):
    i = i.lower()
    wordreversed.append(i)

for i in word:
    i = i.lower()
    wordoriginal.append(i)

return wordoriginal == wordreversed

Upvotes: 0

Krishna Chaitanya Nelloore
Krishna Chaitanya Nelloore

Reputation: 39

This should work.

return (s[:1+len(s)//2]==s[len(s)//2:][::-1])

Upvotes: 0

Kwaw Annor
Kwaw Annor

Reputation: 1458

Using string subscripting

def is_palindrome(string):
    return all(char == string[-i - 1] for i, char in enumerate(string))

Using list reversing

def is_palindrome(string):
    to_list = list(string)

    # reverse to_list now
    to_list.reverse()

    # our reversed list should be equal string as a list
    # if string is a palindrome
    return to_list == list(string)

Upvotes: 1

Jimmy Smith
Jimmy Smith

Reputation: 13

This is mine:

  def palindrome_checker(word):
      return True if len(word) < 2 else (word[0] == word[-1]) and palindrome_checker(word[1:-1])

Upvotes: 0

Emmanuel Kuda Wagoneka
Emmanuel Kuda Wagoneka

Reputation: 1

This is what I came up with, hope it works for you:

def palindrome_(word):
    word = input("enter your word Here ")
    return word == word[::-1]

print palindrome_("word")

Upvotes: -1

Noctis Skytower
Noctis Skytower

Reputation: 21991

You might try this function:

def is_palindrome(text):
    return text[:len(text)//2] == text[:(len(text)-1)//2:-1]

Here is example usage for reference:

>>> is_palindrome('')
True
>>> is_palindrome('a')
True
>>> is_palindrome('b')
True
>>> is_palindrome('aa')
True
>>> is_palindrome('ab')
False
>>> is_palindrome('ba')
False
>>> is_palindrome('bb')
True
>>> is_palindrome('aaa')
True
>>> is_palindrome('aab')
False
>>> is_palindrome('aba')
True

Upvotes: 2

petr jandak
petr jandak

Reputation: 11

here is mine: 

def isPalindrome(word):
    word=str(word)
    a=word[::-1]
    if a!=word:
        return False
    elif word=='':
        return False
    else: return True

Upvotes: 1

Ken
Ken

Reputation: 1858

If you are asking how to get Python to take user input, then there are a couple options available to you. One option is to make your script run from the command line and use a command line argument and the other is to use the raw_input function. Both are implemented in the following code. 

import sys

def isPalindrome(word):
    ...

if __name__ == '__main__':
    if len(sys.argv) > 1:
        inp = sys.argv[1]
    else:
        inp = raw_input("Type a word: ") # Which you might want to strip for white space
    if isPalindrome(inp):
        print inp,"is a palindrome"
    else:
        print inp,"is not a palindrome"

Several other people have suggested alternative implementations for isPalindrome that are probably better, but if you are doing this as an assignment and are supposed to use recursion, then keep using yours. Also, the raw_input function can be called anywhere that is convenient in your script and doesn't have to be used when called from the command line.

Upvotes: 2

hexparrot
hexparrot

Reputation: 3417

Also using a reversed string, but can be used in-line, as well (i.e., doesn't require a function).

def is_palindrome(word):
    return word == ''.join(reversed(word))

print is_palindrome('hello') #False
print is_palindrome('racecar') #True

Upvotes: 2

Related Questions