Question

我回到Python上，目前正在研究从excel工作表的各个点获取登录名和相关数字的代码，将这些数字相加，然后将该名称添加到具有相关值的字典中“低”，“中”或“高”。我已经能够使代码以函数形式工作，并且目前正在将其放入类中：

import pandas as pd
import xlrd
import sys

class aggregateActivity:

    def __init__(self):
        self.l = "path to excel file"
        self.s = "name of excel worksheet"
        self.activityAssociation = {}

        dfs = pd.read_excel(self.l, self.s, usecols=[1,2,3])
        numberOfLogins = dfs.sum(axis=1)
        activity = {}

        for index, row in dfs.iterrows():
            activity[row[0]]=numberOfLogins[index]

        for key in activity:
            if activity.get(key) < 100:
                activityAssociation[key] = "Low"
            if activity.get(key) >= 100 and activity.get(key) < 200:
                activityAssociation[key] = "Medium"
            if activity.get(key) >= 200:
                activityAssociation[key] = "High"

x = aggregateActivity()

x.activityAssociation

这里的问题是，当我运行代码时，jupyter输出一个空字典：

{}

我检查了字典是否确实添加了内容，将print(activityAssociation)追加到了类的末尾，并可以确认是否确实如此。

Answer 1

您忘记了self.，这导致python创建一个新的activityAssociation local 变量

import pandas as pd
import xlrd
import sys

class aggregateActivity:

    def __init__(self):
        self.l = "path to excel file"
        self.s = "name of excel worksheet"
        self.activityAssociation = {}

        dfs = pd.read_excel(self.l, self.s, usecols=[1,2,3])
        numberOfLogins = dfs.sum(axis=1)
        activity = {}

        for index, row in dfs.iterrows():
            activity[row[0]]=numberOfLogins[index]

        for key in activity:
            if activity.get(key) < 100:
                self.activityAssociation[key] = "Low"
            if activity.get(key) >= 100 and activity.get(key) < 200:
                self.activityAssociation[key] = "Medium"
            if activity.get(key) >= 200:
                self.activityAssociation[key] = "High"

x = aggregateActivity()

x.activityAssociation

如何输出我在Python熊猫课程中制作的字典

1 个答案: