无法找到导入数据的平均值 XML

Question

必须通过导入 properties.xml 从 XML 数据中找到平均净收入然后将数据库中包含平均净收入的行发送到键字典。当我在平均收入函数中使用公式时，什么也没有打印出来。即使我尝试在将它发送到字典之前直接从函数中打印出来。

from helper import fixNumber
import xml.etree.cElementTree as ET

tree = ET.parse("properties.xml")
root = tree.getroot()

list = []

for child in root:
    data = child.attrib.copy()
    data['netIncome'] = fixNumber(child.text)
    data["id"] = (data["id"])
    data['cost'] = fixNumber(data['cost'])
    data['downPayment'] = fixNumber(data['downPayment'])
    data['state'] = (data['state'])
    data['percentage'] = fixNumber(data['percentage'])
    list.append(data)

def average_income(data):
    return data['netIncome']


average = sum(data['netIncome']) / len(data['netIncome'])

print(average)

然后必须将具有平均净收入的数据行发送到此字典

if __name__ == '__main__':
    my_func = {
        5: average_income
     }

    for key in my_func:
        funct = my_func[key]
        print(f"{key}", funct(data))

我收到这个错误

Traceback (most recent call last):
  File "/VisualStudio/01.LESSON/properties.py", line 34, in <module>
    average = sum(data['netIncome']) / len(data['netIncome'])
TypeError: 'float' object is not iterable

这是代码中调用的 properties.xml 示例

<properties>
    <property id="H00001" cost="106000"  downPayment="24380" state="NM" percentage="0.12">2925.6</property>
    <property id="H00002" cost="125000"  downPayment="30000" state="AZ" percentage="0.15">4500</property>
    <property id="H00003" cost="119000"  downPayment="24990" state="NH" percentage="0.13">3248.7</property>
    <property id="H00004" cost="124000"  downPayment="31000" state="MI" percentage="0.19">5890</property>
    <property id="H00005" cost="143000"  downPayment="34320" state="CZ" percentage="0.11">3775.2</property>
    <property id="H00006" cost="139000"  downPayment="30580" state="VI" percentage="0.12">3669.6</property>
    <property id="H00007" cost="132000"  downPayment="26400" state="ND" percentage="0.19">5016</property>
    <property id="H00008" cost="134000"  downPayment="26800" state="CZ" percentage="0.17">4556</property>
    <property id="H00009" cost="143000"  downPayment="34320" state="PA" percentage="0.14">4804.8</property>
    <property id="H00010" cost="123000"  downPayment="25830" state="IN" percentage="0.2">5166</property>
</properties>

Answer 1

尝试更改平均值以使用您创建的列表而不是使用 for 循环中的变量：

from helper import fixNumber
import xml.etree.cElementTree as ET

tree = ET.parse("properties.xml")
root = tree.getroot()

data_list = []

for child in root:
    data = child.attrib.copy()
    data['netIncome'] = fixNumber(child.text)
    data["id"] = (data["id"])
    data['cost'] = fixNumber(data['cost'])
    data['downPayment'] = fixNumber(data['downPayment'])
    data['state'] = (data['state'])
    data['percentage'] = fixNumber(data['percentage'])
    data_list.append(data)

average = sum([i['netIncome'] for i in data_list]) / len(data_list)

print(average)

我还将列表重命名为 data_list 以防止隐藏内置列表关键字。

这还假设您的 fixNumber 函数 returns 是 int 或 float。

无法找到导入数据的平均值 XML

Having trouble finding the average of data from imported XML

python

xml

database

import

attributes