CODEWITHSUNDEEP
pythonpalindrome
user3672933
user3672933

Reputation: 17

Check if a string is palindrome ignoring whitespace and special characters

So, basically I want to check if a string is palindrome or not

I know I can simply use

def palindrome(n):
    return n == n[::-1]

It works fine, but if I want a string, for example "A cat, one crab, lol: barcenotaca." to be true as well, what can I do?

Upvotes: 1

Views: 10086

Answers (4)

EvanB54
EvanB54

Reputation: 1

def palindrome():
    stringOne = alphaCheck("give me a lovely palindrome")
    stringTwo = stringOne[::-1]
    for i in stringOne:
        print(i)
    for j in stringTwo:
        print(j)
    if stringOne == stringTwo:
        return True
    else:
        return False

def alphaCheck(prompt):
    stringOne = input(prompt)
    stringOne = stringOne.replace(" ", "")
    stringOne = stringOne.lower()
    while not stringOne.isalpha():
        stringOne = input(prompt)
    return stringOne

print(palindrome())

this method allows you to input your own palindrome and also checks to ensure that it only contains alphabetic characters. if you want to change that to only digits change while not stringOne.isalpha( ) to is

Upvotes: 0

Mohamed Fathi
Mohamed Fathi

Reputation: 14

try checking if every letter in the given string is in the alphabet first, goes something like this 

import string
def palindrome(str):
    alphabet=string.ascii_lowercase
    temp=""
    for c in str.lower():
        if c in alphabet:
            temp+=c
    return temp==temp[::-1]

Upvotes: 0

zs2020
zs2020

Reputation: 54514

def palindrome(n):
    x = ''.join([x.lower() for x in n if x.isalpha()])
    return x == x[::-1]

Upvotes: 2

inspectorG4dget
inspectorG4dget

Reputation: 113915

def palindrome(n):
    n = n.lower()
    n = ''.join(char for char in n if char.isalpha())
    return n==n[::-1]

Checking for char.isalpha() lets you ignore everything that's not a letter (when combined with the n = n.lower(), it basically checks for only lowercase letters) That way, you ignore all the punctuation and whitespace

Upvotes: 3

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