 # A dictionary of movie critics and their ratings of a small
 # set of movies

print('曼哈顿距离算法')

from math import sqrt
import recommendations

def sim_manhattan(perfs,person1,person2):
	"""返回一个有关person1与person2的基于距离的相似度评价 (曼哈顿距离算法)"""
	si={} #得到shared_items的列表

	return si;

print(sim_manhattan(recommendations.critics,'Lisa Rose','Gene Seymour'))






















