使用多个 children 解析 xml

Question

我正在尝试用 python 解析一个 xml 文件，它在 s_amount 行返回一个 AttributeError 'NoneType' object has no attribute 'text'。 xml 文件有 n 个产品的 product-id、数量、数量和 price-info（示例文件中的三个），理想情况下我想生成一行 table每个产品 ID 和可用时填写的相关列（金额、数量和 price-info）。产品 5340958 将有多个行，因为它有多个数量。

xml 文件提取：

<?xml version="1.0" encoding="UTF-8"?>
<pricebooks xmlns="http:...">
    <pricebook>
        <header pricebook-id="IT21">
            <currency>EUR</currency>
        </header>

        <price-tables>
            <price-table product-id="16780001">
                <amount quantity="1">15.00</amount>
                <price-info>2021</price-info>
            </price-table>

            <price-table product-id="5340958">
                <amount quantity="1">5</amount>
                <amount quantity="2">5</amount>
                <amount quantity="3">50</amount>
            </price-table>

            <price-table product-id="864564543">
                <amount quantity="1">60</amount>
            </price-table>

        </price-tables>
    </pricebook>
</pricebooks>

当前 python 脚本：

import pandas as pd
import xml.etree.ElementTree as et

xtree = et.parse("C:...ITfile.xml")
xroot = xtree.getroot()

df_cols = ["product-id", "quantity", "amount", "price-info"]
rows = []
for pricebook in xroot:
    for element in pricebook[1:]:
        for pricetable in element:
            s_product_id = pricetable.attrib.get("product-id")
            rows.append({"product-id": s_product_id})
            for item in pricetable:
                s_quantity = item.attrib.get("quantity")
                rows.append({"quantity": s_quantity})
                s_amount = item.find("amount").text
                rows.append({"amount": s_amount})

out_df = pd.DataFrame(rows, columns = df_cols)

Answer 1

您可以使用此代码段将数据从 XML 文件解析为 DataFrame：

import pandas as pd
import xml.etree.ElementTree as et


xtree = et.parse("file.xml")
namespaces = {'myprefix':'http:...'}  # <-- this is from <pricebooks xmlns="http:...">

df_cols = ["product-id", "quantity", "amount", "price-info"]
rows = []

for row in xtree.findall('.//myprefix:price-table[@product-id]', namespaces):
    price_info = row.find('.//myprefix:price-info', namespaces)
    if not price_info is None:
        price_info = price_info.text
    for amount in row.findall('.//myprefix:amount[@quantity]', namespaces):
        rows.append(dict(zip(df_cols, [row.attrib.get('product-id'), amount.attrib.get('quantity'), amount.text, price_info])))


df = pd.DataFrame(rows)
print(df)

打印：

  product-id quantity amount price-info
0   16780001        1  15.00       2021
1    5340958        1      5       None
2    5340958        2      5       None
3    5340958        3     50       None
4  864564543        1     60       None

使用多个 children 解析 xml

Parsing xml with multiple children

python

xml

dataframe

xml-parsing

elementtree