判断字符串是否为回文 python

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'