palindromic Python algorithm

palin.py

#!/usr/bin/env 

def palin(s):
	j = len(s)
	if j == 1:
		return True
	i = 0
	while i <= j:
		if s[i] != s[j-1]:
			return False
		i += 1
		j -= 1
	return True

print palin("1101011")