使用 ElementTree 读取 .xml 等电子表格

我正在使用 ElementTree 读取 xml 文件，但有一个单元格无法读取其数据。

我调整了我的文件以制作一个可重现的示例，如下所示：

from xml.etree import ElementTree
import io

xmlf = """<?xml version="1.0"?>
<?mso-application progid="Excel.Sheet"?>
<Workbook ss:ResourcesPackageName="" ss:ResourcesPackageVersion="" xmlns="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
 xmlns:html="http://www.w3.org/TR/REC-html40">
  <Worksheet ss:Name="DigitalOutput" ss:IsDeviceType="true">
     <Row ss:AutoFitHeight="0">
    <Cell><Data ss:Type="String">A</Data><NamedCell ss:Name="_FilterDatabase"/></Cell>
    <Cell><Data ss:Type="String">B</Data><NamedCell ss:Name="_FilterDatabase"/></Cell>
    <Cell><Data ss:Type="String">C</Data><NamedCell ss:Name="_FilterDatabase"/></Cell>
    <Cell ss:Index="7"><ss:Data ss:Type="String"
      xmlns="http://www.w3.org/TR/REC-html40"><Font html:Color="#000000">CAN'T READ </Font><Font>THIS</Font></ss:Data><NamedCell
      ss:Name="_FilterDatabase"/></Cell>
    <Cell ss:Index="10"><Data ss:Type="String">D</Data><NamedCell
      ss:Name="_FilterDatabase"/></Cell>
   </Row>
   </Worksheet>
 </Workbook>"""

ss = "urn:schemas-microsoft-com:office:spreadsheet"
worksheet_label = '{%s}Worksheet' % ss
row_label = '{%s}Row' % ss
cell_label = '{%s}Cell' % ss
data_label = '{%s}Data' % ss

tree = ElementTree.parse(io.StringIO(xmlf))
root = tree.getroot()

for ws in root.findall(worksheet_label):
    for table in ws.findall(row_label):
        for c in table.findall(cell_label):
            data = c.find(data_label)
            print(data.text)

输出是：

A
B
C
None
D

因此，第四个单元格未被读取。你能帮我解决这个问题吗？

Question：使用 ElementTree 读取 .xml 等电子表格

文档：lxml.etree 教程 - 命名空间 https://lxml.de/tutorial.html#namespaces

1. 定义namespaces used

   ns = {'ss':"urn:schemas-microsoft-com:office:spreadsheet",
         'html':"http://www.w3.org/TR/REC-html40"
        }
   

2. Use the namespaces with find(.../findall(...

   tree = ElementTree.parse(io.StringIO(xmlf))
   root = tree.getroot()
   
   for ws in root.findall('ss:Worksheet', ns):
       for table in ws.findall('ss:Row', ns):
           for c in table.findall('ss:Cell', ns):
               data = c.find('ss:Data', ns)
               if data.text is None:
                   text = []
                   data = data.findall('html:Font', ns)
                   for element in data:
                       text.append(element.text)
   
                   data_text = ''.join(text)
                   print(data_text)
               else:
                   print(data.text)
   

Output:

A
B
C
CAN'T READ THIS
D

使用 Python 测试：3.5