如何在 python/pandas 的帮助下显示 xml 文件的多个父节点？

Question

我是 python 的新手，正在寻找以下问题的解决方案：

我有一个 file.xml 看起来像这样：

<?xml version="1.0" encoding="UTF-8"?>
<HEADER>
    <PRODUCT_DETAILS>
        <DESCRIPTION_SHORT>green cat w short hair</DESCRIPTION_SHORT>
        <DESCRIPTION_LONG>green cat w short hair and unlimited zoomies</DESCRIPTION_LONG>
    </PRODUCT_DETAILS>
    <PRODUCT_FEATURES>
        <FEATURE>
            <FNAME>Colour</FNAME>
            <FVALUE>green</FVALUE>
        </FEATURE>
        <FEATURE>
            <FNAME>Legs</FNAME>
            <FVALUE>14</FVALUE>
        </FEATURE>
    </PRODUCT_FEATURES>
    <PRODUCT_DETAILS>
        <DESCRIPTION_SHORT>blue dog w no tail</DESCRIPTION_SHORT>
        <DESCRIPTION_LONG>blue dog w no tail and unlimited zoomies</DESCRIPTION_LONG>
    </PRODUCT_DETAILS>
    <PRODUCT_FEATURES>
        <FEATURE>
            <FNAME>Colour</FNAME>
            <FVALUE>blue</FVALUE>
        </FEATURE>
        <FEATURE>
            <FNAME>Happiness Levels</FNAME>
            <FVALUE>11/10</FVALUE>
        </FEATURE>
    </PRODUCT_FEATURES>
</HEADER>

这是我的代码：

from lxml import etree as et
import pandas as pd

xml_data = et.parse('file2.xml')
products = xml_data.xpath('//HEADER')

headers=[elem.tag for elem in xml_data.xpath('//HEADER[1]//PRODUCT_DETAILS//*')]
headers.extend(xml_data.xpath('//HEADER[1]//FNAME/text()'))

rows = []

for product in products:

    row = [product.xpath(f'.//{headers[0]}/text()')[0],product.xpath(f'.//{headers[1]}/text()')[0]]
    
    f_values = product.xpath('.//FVALUE/text()')
    row.extend(f_values)    
    rows.append(row)

df = pd.DataFrame(rows,columns=headers)

df
# df.to_csv("File2_Export_V1.csv", index=False)

这是我想要的输出：

    DESCRIPTION_SHORT       DESCRIPTION_LONG                                Colour  Legs    Happiness Levels
0   green cat w short hair  green cat w short hair and unlimited zoomies    green   14      
1   blue dog w no tail      blue dog w no tail and unlimited zoomies        blue            11/10

我解决这个问题的尝试是像这样扩展一行：

headers=[elem.tag for elem in xml_data.xpath('//HEADER[1]//PRODUCT_DETAILS//*'),('//HEADER[2]//PRODUCT_DETAILS//*')]

遗憾的是，我收到语法错误且没有解决方案。

如何调整我的代码以反映 xml 结构？

提前致谢！ ~C

Answer 1

可能不是最好的解决方案，但我认为它很漂亮 straight-forward，而且清晰。

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

# Get xml object
tree = ET.parse('file2.xml')
root = tree.getroot()

# Create final DataFrame
out = pd.DataFrame()

# Loop over all products (Product = (DETAILS, FEATURES))
for i in range(0, len(root), 2):
    # Get all descriptions
    descriptions = [(child.tag, child.text) for child in root[i]]
    # Get all features
    features = [(child[0].text, child[1].text) for child in root[i + 1]]

    # Create a DataFrame, where columns are the tags, and values are, well, values
    temp_df = pd.DataFrame([[i[1] for i in descriptions + features]], columns=[i[0] for i in descriptions + features])

    # Append to final DataFrame
    out = pd.concat([out, temp_df])

如何在 python/pandas 的帮助下显示 xml 文件的多个父节点？

How do I show multiple parent nodes of xml file with the help of python/pandas?

python

pandas

xml

export-to-csv