使用 ElementTree 读取类似 .xml 的电子表格

Question

我正在使用 ElementTree 读取一个 xml 文件，但是有一个单元格我无法读取其中的数据。

我修改了我的文件，制作了一个可重现的示例，我将在接下来展示：

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)

输出为：

A
B
C
None
D

所以，第四个单元格没有被读取。你能帮我解决这个问题吗？

Answer 1

第四个单元格的文本内容属于绑定到另一个名称空间的两个 Font 子元素。演示：

for e in root.iter():
    text = e.text.strip() if e.text else None 
    if text:
        print(e, text)

输出：

<Element {urn:schemas-microsoft-com:office:spreadsheet}Data at 0x7f8013d01dc8> A
<Element {urn:schemas-microsoft-com:office:spreadsheet}Data at 0x7f8013d01dc8> B
<Element {urn:schemas-microsoft-com:office:spreadsheet}Data at 0x7f8013d01dc8> C
<Element {http://www.w3.org/TR/REC-html40}Font at 0x7f8013d01e08> CAN'T READ
<Element {http://www.w3.org/TR/REC-html40}Font at 0x7f8013d01e48> THIS
<Element {urn:schemas-microsoft-com:office:spreadsheet}Data at 0x7f8013d01e48> D

Answer 2

Question: Reading a spreadsheet like .xml with ElementTree

文档：The lxml.etree Tutorial- Namespaces

定义namespaces使用

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

将namespaces与find(.../findall(...

结合使用

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

测试 Python：3.5

使用 ElementTree 读取类似 .xml 的电子表格

Reading a spreadsheet like .xml with ElementTree

python

xml

elementtree

xml-namespaces