# encoding: utf-8
"""
@author: vinklibrary
@contact: shenxvdong1@gmail.com
@site: Todo

@version: 1.0
@license: None
@file: metrics.py
@time: 2019/7/15 16:25

推荐系统中的评价指标计算
"""
def Recall():
    return "TODO"

def Precision():
    return  "TODO"

def Coverage():
    return "TODO"

def Popularity():
    # 评测推荐系统的新颖度
    return "TODO"

