我正在使用Python批量编辑当前如下所示的许多musicXML文件:
<score-partwise>
...
<attributes>
<transpose>
<diatonic>-5</diatonic>
<chromatic>-9</chromatic>
</transpose>
</attributes>
...
</score-partwise>
如何在<octave-change>-1</octave-change>
中添加<transpose></transpose>
,如下所示?
<score-partwise>
...
<attributes>
<transpose>
<diatonic>-5</diatonic>
<chromatic>-9</chromatic>
<octave-change>-1</octave-change>
</transpose>
</attributes>
...
</score-partwise>
我试过这个:
import xml.etree.ElementTree as ET
attributes = ET.Element("attributes")
attributes.append(ET.fromstring('<transpose><octave-change>-1</octave-change></transpose>'))
没有成功。
非常感谢任何帮助。谢谢。
答案 0 :(得分:2)
找到元素并追加:
x = """<score-partwise>
<attributes>
<transpose>
<diatonic>-5</diatonic>
<chromatic>-9</chromatic>
</transpose>
</attributes>
</score-partwise>"""
import xml.etree.ElementTree as et
xml = et.fromstring(x)
#
xml.find("attributes").append(et.fromstring('<transpose><octave-change>-1</octave-change></transpose>'))
print(et.tostring(xml))
这给了你:
<score-partwise>
<attributes>
<transpose>
<diatonic>-5</diatonic>
<chromatic>-9</chromatic>
</transpose>
<transpose><octave-change>-1</octave-change></transpose></attributes>
</score-partwise>
如果您只想附加到现有的转置元素,那么也会添加一个新的转置元素,然后选择它。
import xml.etree.ElementTree as et
xml = et.fromstring(x)
xml.find(".//attributes/transpose").append(et.fromstring('<octave-change>-1</octave-change>'))
print(et.tostring(xml))
这给了你:
<score-partwise>
<attributes>
<transpose>
<diatonic>-5</diatonic>
<chromatic>-9</chromatic>
<octave-change>-1</octave-change></transpose>
</attributes>
</score-partwise>
您还可以使用允许您访问节点的SubElement:
xml = et.fromstring(x)
print(et.tostring(xml))
e = et.SubElement(xml.find(".//attributes/transpose"), "octave-change")
e.text = "-1"
e.tail= "\n"
如果您想格式化,您可能会发现 lxml 是更好的选择:
将lxml.etree导入为
parser = et.XMLParser(remove_blank_text=True)
xml = et.parse("test.xml",parser)
xml.find(".//attributes/transpose").append(et.fromstring('<octave-change>-1</octave-change>'))
xml.write('test.xml', pretty_print=True)
将写下:
<score-partwise>
<attributes>
<transpose>
<diatonic>-5</diatonic>
<chromatic>-9</chromatic>
<octave-change>-1</octave-change>
</transpose>
</attributes>
</score-partwise>