Python minidom：如何获取具有相同属性值的第一个子节点的父节点

我有一个巨大的xml文件。我在此仅举一个例子：

<?xml version="1.0"?>
<data yahoo="state">
<country name="Cambodia">
    <neighbor name="Thailand" direction="W"/>
    <neighbor name="Vietnam" towards="E"/>
</country>
<country name="Singapore">
    <neighbor name="Malaysia" dimension="N"/>
</country>
<country name="Panama">
    <neighbor name="Costa Rica" dimension="W"/>
    <neighbor name="Colombia" towards="E"/>
</country>
</data>

---

在字典中映射相邻节点，并按其

方向

值对它们进行分组：

from collections import defaultdict

by_direction = defaultdict(list)

# map directions
for neighbor in xmldoc.getElementsByTagName("neighbor"):
    if not 'direction' in neighbor.attributes:
        continue
    direction = neighor.attributes['direction'].value
    by_direction[direction].append(neighbor)

# look up by dimension:
for neighbor in xmldoc.getElementsByTagName("neighbor"):
    if not 'dimension' in neighbor.attributes:
        continue
    dimension = neighor.attributes['dimension'].value
    print neighbor.parentNode
    for node in by_direction[dimension]:
        print node.parentNode

from xml.dom import minidom
xmldoc = minidom.parse("C:/Users/Dsduda/Desktop/Countries.xml")
x = xmldoc.getElementsByTagName("neighbor")
y = xmldoc.getElementsByTagName("neighbor")
for s in x and t in y:
    if s.attributes["direction"].value == t.attributes["dimension"].value:
          print s.parentNode, t.parentNode

from collections import defaultdict

by_direction = defaultdict(list)

# map directions
for neighbor in xmldoc.getElementsByTagName("neighbor"):
    if not 'direction' in neighbor.attributes:
        continue
    direction = neighor.attributes['direction'].value
    by_direction[direction].append(neighbor)

# look up by dimension:
for neighbor in xmldoc.getElementsByTagName("neighbor"):
    if not 'dimension' in neighbor.attributes:
        continue
    dimension = neighor.attributes['dimension'].value
    print neighbor.parentNode
    for node in by_direction[dimension]:
        print node.parentNode