使用python包含额外的静态XML

我需要我的当前脚本包含额外的xml。这是当前形式的脚本:

import csv
import sys
from xml.etree import ElementTree
from xml.dom import minidom
video_data = ((256, 336000),
              (512, 592000),
              (768, 848000),
              (1128, 1208000))
with open(sys.argv[1], 'rU') as f:
    reader = csv.DictReader(f)
    for row in reader:
        switch_tag = ElementTree.Element('switch')
        for suffix, bitrate in video_data:
            attrs = {'src': ("mp4:soundcheck/{year}/{id}/{file_root_name}_{suffix}.mp4"
                             .format(suffix=str(suffix), **row)),
                     'system-bitrate': str(bitrate),
                     }
            ElementTree.SubElement(switch_tag, 'video', attrs)
        print minidom.parseString(ElementTree.tostring(switch_tag)).toprettyxml()

当前输出如下xml:

    <?xml version="1.0" ?>
   <switch>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_256.mp4" system-bitrate="336000"/>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_512.mp4" system-bitrate="592000"/>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_768.mp4" system-bitrate="848000"/>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_1128.mp4" system-bitrate="1208000"/>
    </switch>

我需要在xml文件的页眉和页脚中包含额外的信息。请看下面的例子:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE smil PUBLIC "-//W3C//DTD SMIL 2.0//EN" "http://www.w3.org/2001/SMIL20/SMIL20.dtd">
<smil xmlns="http://www.w3.org/2001/SMIL20/Language">
  <head>
    <meta base="rtmp://cp23636.edgefcs.net/ondemand" />
  </head>
  <body>
    <switch>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_256.mp4" system-bitrate="336000"/>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_512.mp4" system-bitrate="592000"/>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_768.mp4" system-bitrate="848000"/>
      <video src="mp4:soundcheck/2006/clay_aiken/02_sc_ca_sorry_1128.mp4" system-bitrate="1208000"/>
    </switch>
  </body>
</smil>

我如何更新我的当前脚本，以包括这个静态信息以及变量正在从csv在脚本当前的形式拉?

你为什么不把

 print minidom.parseString(ElementTree.tostring(switch_tag)).toprettyxml()

 print header + ElementTree.tostring(switch_tag) + footer

其中header和footer分别是第二个示例输出中开关标签的上方和下方。或者，如果您想使用prettyxml()，请从其输出中删除第一行。

 'n'.join(minidom.parseString(ElementTree.tostring(switch_tag)).toprettyxml().splitlines()[1:])

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