Simple palindrome code check

palindrome.py

#!/Users/smanurung/miniconda3/bin/python

class Person:
    name = "foo"

    def sayName(self):
        return self.name
    
    def setName(self, n):
        self.name = n

class Candidate:

    cand = ''

    def isPalindrome(self, s):
        str = list(s)

        l = 0
        r = len(str) - 1

        while l <= r:
            if str[l] == str[r]:
                l += 1
                r -= 1
            else:
                return False
        return True
        

if __name__ == "__main__":
    p = Person()
    # print(p.sayName())

    p.setName("Harrison")
    # print(p.sayName())

    c = Candidate()
    # print(c.isPalindrome())

    while True:
        x = input("candidate for palindrome: ")
        print("isPalindrome({}): {}".format(x, c.isPalindrome(x)))

Below is the execution example:

$ python sample.py 
candidate for palindrome: aza
isPalindrome(aza): True
candidate for palindrome: test
isPalindrome(test): False
candidate for palindrome: crazy
isPalindrome(crazy): False
candidate for palindrome: xanananax
isPalindrome(xanananax): True