利用 xml.dom.minidom 生成 xml，解决属性无序问题和xml声明单独一行

1.问题描述

属性无序问题和xml声明不是单独一行

# cat HKEX-EPS_20180830_003249795.xml

>TCML><News Encoding="UTF-8" Language="en-us" TimeStamp="20180830194015">246843820180830194015HKEX-EPSAMENDEDen-usCHANGE OF COMPANY NAME,STOCK SHORT NAME AND COMPANY LOGO20180831MAINfalseHKEX-EPS_20180830_003249795_0.PDFAPPLICATION/PDF521386127001979010000185401400?地科技股份满地科技股份MOODY TECH HLDGET Net IIS Category ListET Net Ltd?2018 ET Net Limited. All rights reserved.

 

达到效果：

cat HKEX-EPS_20180830_003249795.xml

>

TCML><News TimeStamp="20180830194015" Encoding="UTF-8" Language="en-us">246843820180830194015HKEX-EPSAMENDEDen-usCHANGE OF COMPANY NAME,STOCK SHORT NAME AND COMPANY LOGO20180831MAINfalseHKEX-EPS_20180830_003249795_0.PDFAPPLICATION/PDF521386127001979010000185401400?地科技股份满地科技股份MOODY TECH HLDGET Net IIS Category ListET Net Ltd?2018 ET Net Limited. All rights reserved.

 

2操作步骤

2.1环境说明

系统自带python2.6.6  升级为 python2.7.10

如果没有升级python2.7，

>>> import sys

>>> sys.path

路径为 /usr/lib64/python2.6/xml/dom

使用的模块是

import xml.dom.minidom

 

2.2换行处理

# cd /usr/local/lib/python2.7/xml/dom/

原始配置

    def writexml(self, writer, indent="", addindent="", newl="",

                 encoding = None):

        if encoding is None:

            writer.write(''+newl)

        else:

            writer.write('%s' % (encoding, newl))

        for node in self.childNodes:

            node.writexml(writer, indent, addindent, newl)

修改配置

    def writexml(self, writer, indent="", addindent="", newl="",

                 encoding = None):

        if encoding is None:

            writer.write(''+'\n')

        else:

            writer.write('%s' % (encoding, '\n'))

        for node in self.childNodes:

            node.writexml(writer, indent, addindent, newl)

 

2.3属性有序处理

原始配置

    def __init__(self, tagName, namespaceURI=EMPTY_NAMESPACE, prefix=None,

                 localName=None):

        self.tagName = self.nodeName = tagName

        self.prefix = prefix

        self.namespaceURI = namespaceURI

        self.childNodes = NodeList()

 

        self._attrs = {}   # attributes are double-indexed:

        self._attrsNS = {} #    tagName -> Attribute

                           #    URI,localName -> Attribute

                           # in the future: consider lazy generation

                           # of attribute objects this is too tricky

                           # for now because of headaches with

                           # namespaces.

......

    def writexml(self, writer, indent="", addindent="", newl=""):

        # indent = current indentation

        # addindent = indentation to add to higher levels

        # newl = newline string

        writer.write(indent+"<" + self.tagName)

        attrs = self._get_attributes()

        a_names = attrs.keys()

        a_names.sort()

 

修改配置：

    def __init__(self, tagName, namespaceURI=EMPTY_NAMESPACE, prefix=None,

                 localName=None):

        self.tagName = self.nodeName = tagName

        self.prefix = prefix

        self.namespaceURI = namespaceURI

        self.childNodes = NodeList()

        #self._attrs = {}   # attributes are double-indexed:

        self._attrs = OrderedDict()   # attributes are double-indexed:

        self._attrsNS = {} #    tagName -> Attribute

                           #    URI,localName -> Attribute

                           # in the future: consider lazy generation

                           # of attribute objects this is too tricky

                           # for now because of headaches with

                           # namespaces.

......

    def writexml(self, writer, indent="", addindent="", newl=""):

        # indent = current indentation

        # addindent = indentation to add to higher levels

        # newl = newline string

        writer.write(indent+"<" + self.tagName)

        attrs = self._get_attributes()

        a_names = attrs.keys()

        #a_names.sort()

 

 

3.总结

亲测可用