回文正序和逆序一样的字符串，例如abccba

方法一

def is_palindrome1(text):    l = list(text)    l.reverse()    t1 = ''.join(l)    if t1 == text:        print 'the text is palindrome'    else:        print 'the text is not palindrome'

方法二

def is_palindrome2(text):    t1 = text[::-1]    if t1 == text:        print 'the text is palindrome'    else:        print 'the text is not palindrome'

方法三

def is_palindrome3(text):    r = True    for x in range(len(text)):        print x,text[x]        if text[x] != text[len(text)-x-1]:            print 1            r = False            break    if r == True:        print 'the text is palindrome'    else:        print 'the text is not palindrome'