如何将xml文件转换为csv python

Question

我希望将这个 xml 文件 countries 转换为 csv 中的表格。但是我在解析它/从中提取数据时遇到问题。我试图将其变成一个包含 5 列的表，分别是 ['CtryNm'、'CcyNm'、'Ccy'、'CcyNbr'、'CcyMnrUnts']。这是 xml 文件结构的片段

<ISO_4217 Pblshd="2024-01-01">
<CcyTbl>
<CcyNtry>
<CtryNm>AFGHANISTAN</CtryNm>
<CcyNm>Afghani</CcyNm>
<Ccy>AFN</Ccy>
<CcyNbr>971</CcyNbr>
<CcyMnrUnts>2</CcyMnrUnts>
</CcyNtry>
<CcyNtry>
<CtryNm>ZZ07_No_Currency</CtryNm>
<CcyNm>The codes assigned for transactions where no currency is involved</CcyNm>
<Ccy>XXX</Ccy>
<CcyNbr>999</CcyNbr>
<CcyMnrUnts>N.A.</CcyMnrUnts>
</CcyNtry>
......
</CcyTbl>
</ISO_4217>

我尝试过做

def parse_xml(xml_file):
    tree = ET.parse(xml_file)
    root = tree.getroot()
    return root

def extract_data(root):
    data = []
    for record in root.findall('CcyNtry'):
        row = {}
        for field in record:
            row[field.tag] = field.text
        data.append(row)
    return data

def main(xml_file, csv_file):
    root = parse_xml(xml_file)
    data = extract_data(root)
    df = to_dataframe(data)
    to_csv(df, csv_file)

main(countries, 'output.csv')

但是这似乎只是返回一个空文件。有人知道我在这里做错了什么吗？或者是否有一种简单的方法可以将此 xml 中的数据转换为数据框？谢谢。

Answer 1

带

beautifulsoup

的版本：

import requests
from bs4 import BeautifulSoup

url = "https://www.six-group.com/dam/download/financial-information/data-center/iso-currrency/lists/list-one.xml"

soup = BeautifulSoup(requests.get(url).content, "xml")

data = []
for c in soup.select("CcyNtry"):
    data.append({t.name: t.text for t in c.find_all()})

df = pd.DataFrame(data)
print(df.head(10))

打印：

                CtryNm                  CcyNm  Ccy CcyNbr CcyMnrUnts
0          AFGHANISTAN                Afghani  AFN    971          2
1        ÅLAND ISLANDS                   Euro  EUR    978          2
2              ALBANIA                    Lek  ALL    008          2
3              ALGERIA         Algerian Dinar  DZD    012          2
4       AMERICAN SAMOA              US Dollar  USD    840          2
5              ANDORRA                   Euro  EUR    978          2
6               ANGOLA                 Kwanza  AOA    973          2
7             ANGUILLA  East Caribbean Dollar  XCD    951          2
8           ANTARCTICA  No universal currency  NaN    NaN        NaN
9  ANTIGUA AND BARBUDA  East Caribbean Dollar  XCD    951          2