PYpalindrome

#!/usr/bin/env python

class Base:
        def __init__(self):
                self.string = raw_input("type in a string:\r\n")
                #print self.pal(self.string)
                if self.pal(self.string) == True:
                        print self.string, "is palindrome"
                else :
                        print self.string, "is NOT palindrome"

        def pal(self,string):
                string = string.lower()
                str_len = len(string)
                for i in range(str_len):
                        if string[i] == string[-(i+1)]:
                                i = True
                        else:
                                i = False
                return i

if __name__ == "__main__":
        root = Base()