“module”对象没有属性“sim\u pearson”

Question

critics = {'Lisa Rose': {'Lady in the Water': 2.5, 'Snakes on a plane': 3.5, 'Just My Luck': 3.0,

'Superman Returns': 3.5, 'You, Me and Dupree': 2.5, 'The Night Listener': 3.0},

'Toby':{'Snakes on a Plane': 4.5, 'You, me and Dupreee': 1.0},

'Gene Seymour':{'Lady in the Water':3.0, 'Snakes on a plane': 3.5,'Just My Luck': 1.5,
    'Superman Returns': 5.0,'You, Me and Dupree': 3.5, 'The Night Listener': 3.0}}

from math import sqrt

def sim_distance(person1, person2):
    si={}
    for item in prefs[person1]:
        if item in prefs[person2]:
            si[item]=1


    if len[si]== 0: return 0


    sum_of_squares=sum([pow[prefs[person1][item]-prefs[person2][item],2]
                        for item in prefes[person1] if item in prefs[person2]])
    return 1/(1+sqrt(sum_of_squares))

---

^{pr2}$

Answer 1

假设上面的代码在一个文件中。在

使用命令行：

1.打开命令行

2.将目录改为python代码所在的位置（使用cd C:\user\Python27或其他任何位置）

3.键入python按enter键（它将启动python的控制台）

4.现在键入以下内容并在每行后按enter键

from recommendations import critics

from recommendations import sim_distance

sim_distance(critics,'Lisa Rose','Gene Seymour')

希望这将有助于运行您的代码