我正在尝试使用 Python 3.3 将 XML 文件转换为 YAML。 这是我的代码：
#! /etc/python3
test_filename_input = './reference-conversions/wikipedia-example.xml'
test_filename_output = 'wikipedia-example_xml_read-as-binary.yaml'
file_object = open( test_filename_input, 'rb')
data_in = file_object.read()
file_object.close()
from xml.dom.minidom import parseString
document_object = parseString( data_in)
import yaml
stream = open( test_filename_output, 'w')
yaml.dump( document_object, stream)
stream.close()
作为参考，我使用了here中的XML文件：
<person>
<firstName>John</firstName>
<lastName>Smith</lastName>
<age>25</age>
<address>
<streetAddress>21 2nd Street</streetAddress>
<city>New York</city>
<state>NY</state>
<postalCode>10021</postalCode>
</address>
<phoneNumbers>
<phoneNumber type="home">212 555-1234</phoneNumber>
<phoneNumber type="fax">646 555-4567</phoneNumber>
</phoneNumbers>
<gender>
<type>male</type>
</gender>
</person>
这应该会导致这样的结果：
---
firstName: John
lastName: Smith
age: 25
address:
streetAddress: 21 2nd Street
city: New York
state: NY
postalCode: 10021
phoneNumber:
-
type: home
number: 212 555-1234
-
type: fax
number: 646 555-4567
gender:
type: male
然而，结果是：
&id001 !!python/object/new:xml.dom.minidom.Document
state: !!python/tuple
- implementation: !!python/object:xml.dom.minidom.DOMImplementation {}
- _elem_info: {}
_id_cache: {}
_id_search_stack: null
childNodes: !!python/object/new:xml.dom.minicompat.NodeList
listitems:
- &id039 !!python/object/new:xml.dom.minidom.Element
state: !!python/tuple
- null
- _attrs: null
_attrsNS: null
childNodes: !!python/object/new:xml.dom.minicompat.NodeList
listitems:
- &id045 !!python/object/new:xml.dom.minidom.Text
state: !!python/tuple
- null
- _data: "\n "
nextSibling: &id002 !!python/object/new:xml.dom.minidom.Element
state: !!python/tuple
- null
- _attrs: null
_attrsNS: null
childNodes: !!python/object/new:xml.dom.minicompat.NodeList
listitems:
[...]
有什么想法，如何让 PyYAML 过滤掉 xml.dom.minidom 中的对象内容或使用 xml.dom.minidom 的任何替代方法吗？
谢谢！
这里有一种方法可以解决 xml.dom 的问题，并提供一种方法来映射节点同时具有内容和属性或子节点的不明确情况。对于上面的示例输入，它会产生：
$ python3 yamlout.py person.xml
---
person:
firstName: John
lastName: Smith
age: 25
address:
streetAddress: 21 2nd Street
city: New York
state: NY
postalCode: 10021
phoneNumbers:
phoneNumber:
_xml_node_content: 212 555-1234
type: home # Attribute
phoneNumber:
_xml_node_content: 646 555-4567
type: fax # Attribute
gender:
type: male
实现，yamlout.py：
import sys
import json
import xml.etree.ElementTree as ET
if len(sys.argv) != 2:
sys.stderr.write("Usage: {0} <file>.xml".format(sys.argv[0]))
XML_NODE_CONTENT = '_xml_node_content'
ATTR_COMMENT = '# Attribute'
def yamlout(node, depth=0):
if not depth:
sys.stdout.write('---\n')
# Nodes with both content AND nested nodes or attributes
# have no valid yaml mapping. Add 'content' node for that case
nodeattrs = node.attrib
children = list(node)
content = node.text.strip() if node.text else ''
if content:
if not (nodeattrs or children):
# Write as just a name value, nothing else nested
sys.stdout.write(
'{indent}{tag}: {text}\n'.format(
indent=depth*' ', tag=node.tag, text=content or ''))
return
else:
# json.dumps for basic handling of multiline content
nodeattrs[XML_NODE_CONTENT] = json.dumps(node.text)
sys.stdout.write('{indent}{tag}:\n'.format(
indent=depth*' ', tag=node.tag))
# Indicate difference node attributes and nested nodes
depth += 1
for n,v in nodeattrs.items():
sys.stdout.write(
'{indent}{n}: {v} {c}\n'.format(
indent=depth*' ', n=n, v=v,
c=ATTR_COMMENT if n!=XML_NODE_CONTENT else ''))
# Write nested nodes
for child in children:
yamlout(child, depth)
with open(sys.argv[1]) as xmlf:
tree = ET.parse(xmlf)
yamlout(tree.getroot())
我找到了一个 XML 到 YAML 转换器，但我必须在第 92 行左右进行一些小的更改：
outStr = yaml.dump(out)
改为
outStr = yaml.safe_dump(out)
删除输出中的所有
!!python/unicode编辑
我还添加了自己的打印方法，使输出看起来更像您最初发布的内容：
def prettyPrint(node, level):
childPrint = 0
attrPrint = 0
for x in node:
try:
if x['attributes']:
attrPrint = 1
for l in range(0, level):
sys.stdout.write("\t")
for a in x['attributes']:
sys.stdout.write("- %s: %s\n" % (a, x['attributes'][a]))
except KeyError:
try:
if x['children']:
childPrint = 1
for l in range(0, level):
sys.stdout.write("\t")
sys.stdout.write("%s:\n" % x['name'])
prettyPrint(x['children'], level+1)
except KeyError:
pass
finally:
if not childPrint:
printNextNode(x, level, attrPrint)
attrPrint = 0
else:
childPrint = 0
def printNextNode(node, level, attrPrint):
for l in range(0, level):
sys.stdout.write("\t")
if attrPrint:
sys.stdout.write(' ')
sys.stdout.write("%s: %s\n" % (node['name'], node['text']))
然后在
convertXml2Yamlsys.stdout.write('%s:\n' % out['name'])
prettyPrint(out['children'], 1)
使用 https://pypi.org/project/yaplon/ -> https://github.com/twardoch/yaplon/
xml22yaml -i "file.xml" -o "file.yaml"但不支持带有 BOM 的 UTF-8 文件。
通过 JSON 对我有用：
print(yaml.dump(xmltodict.parse(xml_doc))
# includes the OrderedDict type into the output
print(yaml.safe_dump(xmltodict.parse(xml_doc))
# throws an exception on not being able to represent the input
json_doc = json.dumps(xmltodict.parse(xml_doc))
print(yaml.safe_dump(json.loads(json_doc)))
# works fine