我有一个KML文件如下：
<?xml version="1.0"?><kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<name>MST =T</name>
<description><![CDATA[<p>KML test file</p>
<p>This is a test version.</p>]]></description>
<Style id="spstyle5">
<IconStyle>
<color>ff3EE23E</color>
<Icon><href>http://maps.google.com/mapfiles/kml/paddle/wht-blank.png</href></Icon>
</IconStyle>
<LineStyle>
<color>ff3EE23E</color>
<width>4</width>
</LineStyle>
</Style>
<Folder>
<name>Track5</name>
<visibility>0</visibility>
<name>sp5_sp6_ Track</name>
<description><![CDATA[<i>sp5_sp6_</i> track<br>pantrack id:5]]></description>
<Placemark>
<name>sp5_sp6_ MST</name>
<description><![CDATA[<i> species sp5_sp6_</i> mst<br>long= 648.000 corte 0.250000]]></description>
<styleUrl>#spstyle5</styleUrl>
<MultiGeometry>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
8.000,8.000 6.000,7.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
5.000,7.000 6.000,7.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
3.000,8.000 5.000,7.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
2.000,8.000 3.000,8.000
</coordinates>
</LineString>
</MultiGeometry>
</Placemark>
</Folder>
<Style id="spstyle7">
<IconStyle>
<color>ffBC77DC</color>
<Icon><href>http://maps.google.com/mapfiles/kml/paddle/wht-blank.png</href></Icon>
</IconStyle>
<LineStyle>
<color>ffBC77DC</color>
<width>4</width>
</LineStyle>
</Style>
<Folder>
<name>Track7</name>
<visibility>0</visibility>
<name>sp1_sp2_sp6_ Track</name>
<description><![CDATA[<i>sp1_sp2_sp6_</i> track<br>pantrack id:7]]></description>
<Placemark>
<name>sp1_sp2_sp6_ MST</name>
<description><![CDATA[<i> species sp1_sp2_sp6_</i> mst<br>long= 441.000 corte 0.250000]]></description>
<styleUrl>#spstyle7</styleUrl>
<MultiGeometry>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
11.000,6.000 12.000,6.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
12.000,6.000 12.000,4.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
12.000,4.000 11.000,3.000
</coordinates>
</LineString>
</MultiGeometry>
</Placemark>
</Folder>
<Style id="spstyle8">
<IconStyle>
<color>ff97287A</color>
<Icon><href>http://maps.google.com/mapfiles/kml/paddle/wht-blank.png</href></Icon>
</IconStyle>
<LineStyle>
<color>ff97287A</color>
<width>4</width>
</LineStyle>
</Style>
<Folder>
<name>Track8</name>
<visibility>0</visibility>
<name>sp3_sp6_sp4_sp6_ Track</name>
<description><![CDATA[<i>sp3_sp6_sp4_sp6_</i> track<br>pantrack id:8]]></description>
<Placemark>
<name>sp3_sp6_sp4_sp6_ MST</name>
<description><![CDATA[<i> species sp3_sp6_sp4_sp6_</i> mst<br>long= 757.000 corte 0.250000]]></description>
<styleUrl>#spstyle8</styleUrl>
<MultiGeometry>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
8.000,8.000 8.000,7.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
8.000,7.000 11.000,6.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
11.000,6.000 11.000,5.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
11.000,6.000 12.000,6.000
</coordinates>
</LineString>
<LineString>
<tessellate>true</tessellate>
<altitudeMode>clampToGround</altitudeMode>
<coordinates>
11.000,5.000 12.000,4.000
</coordinates>
</LineString>
</MultiGeometry>
</Placemark>
</Folder>
</Document>
</kml>
我想分别提取每个地标的名称以及与该地标相关联的LineString标记中的所有坐标，结果如下：
Placemark A
x, y
x, y
x, y
...
Placemark B
x, y
x, y
x, y
我已经尝试了所有提出的解决方案here，但它们都不适用于我的数据。实际上，所有解决方案都是高度通用的，没有提供测试数据来检查它们。
更新：我在下面的代码中取得了一些进展，它允许提取所有地标和线路坐标（我只是忘记该死的命名空间）：
from pykml import parser
filename = "output0.kml"
with open(filename) as f:
root = parser.parse(f).getroot()
pms = root.findall('.//{http://earth.google.com/kml/2.1}Placemark')
lst = doc.findall('.//{http://earth.google.com/kml/2.1}LineString')
for pm in pms:
print(pm.name)
for ls in lst:
print(ls.coordinates)
但仍然无法弄清楚如何提取按地标分组的坐标 ！
答案 0 :(得分：2)
简单地嵌套for循环，其中内部解析工作在外部解析元素之外。此外，您可以使用内置的etree模块，因为kml是xml文件。
import xml.etree.ElementTree as et
doc = et.parse("source.kml")
nmsp = '{http://earth.google.com/kml/2.1}'
for pm in doc.iterfind('.//{0}Placemark'.format(nmsp)):
print(pm.find('{0}name'.format(nmsp)).text)
for ls in pm.iterfind('{0}MultiGeometry/{0}LineString/{0}coordinates'.format(nmsp)):
print(ls.text.strip().replace('\n',''))
# sp5_sp6_ MST
# 8.000,8.000 6.000,7.000
# 5.000,7.000 6.000,7.000
# 3.000,8.000 5.000,7.000
# 2.000,8.000 3.000,8.000
# sp1_sp2_sp6_ MST
# 11.000,6.000 12.000,6.000
# 12.000,6.000 12.000,4.000
# 12.000,4.000 11.000,3.000
# sp3_sp6_sp4_sp6_ MST
# 8.000,8.000 8.000,7.000
# 8.000,7.000 11.000,6.000
# 11.000,6.000 11.000,5.000
# 11.000,6.000 12.000,6.000
# 11.000,5.000 12.000,4.000