判断字符串是否为回文 python

2024-08-24 05:05:37

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'

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