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python xml解析和生成

时间:2016-10-03 14:53:09      阅读:356      评论:0      收藏:0      [点我收藏+]

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解析使用xml.etree.ElementTree 模块,生成使用xml.dom.minidom模块,  ElementTree比dom快,dom生成简单且会自动格式化。

 

<?xml version=‘1.0‘ encoding=‘utf-8‘?>
<baspools>
        <bas>
                <basprovider>0</basprovider>
                <portal_version>1</portal_version>
                <timeout>111</timeout>
                <retry>111</retry>
                <auth_type>111</auth_type>
        </bas>
        <bas>
                <basprovider>0</basprovider>
                <portal_version>1</portal_version>
                <timeout>5000</timeout>
                <retry>3</retry>
                <auth_type>0</auth_type>
        </bas>
</baspools>

 

解析为dict:
{0: {retry: 111, auth_type: 111, portal_version: 1, timeout: 111, basprovider: 0}, 1: {retry: 3, auth_type: 0, portal_version: 1, timeout: 5000, basprovider: 0}}
将上述字典再还原xml


执行代码:
# coding = ‘utf-8‘
import time
import xml.etree.ElementTree as ET
import xml.dom.minidom as minidom
start = time.clock()  # 记录处理开始时间;与最后一行一起使用,来判断输出运行时间。

def read_xml(in_path):
    """读取并解析xml文件
       in_path: xml路径
       return: tree"""
    tree = ET.parse(in_path)
    return tree

def creat_dict(root):
    """xml生成为dict:,
    将tree中个节点添加到list中,将list转换为字典dict_init
    叠加生成多层字典dict_new"""
    dict_new = {}
    for key, valu in enumerate(root):
        dict_init = {}
        list_init = []
        for item in valu:
            list_init.append([item.tag, item.text])
            for lists in list_init:
                dict_init[lists[0]] = lists[1]
        dict_new[key] = dict_init
    return dict_new

def dict_to_xml(input_dict, root_tag, node_tag):
    """ 定义根节点root_tag,定义第二层节点node_tag
    第三层中将字典中键值对对应参数名和值
       return: xml的tree结构 """
    root_name = ET.Element(root_tag)
    for (k, v) in input_dict.items():
        node_name = ET.SubElement(root_name, node_tag)
        for key, val in v.items():
            key = ET.SubElement(node_name, key)
            key.text = val
    return root_tag

def out_xml(root):
    """格式化root转换为xml文件"""
    rough_string = ET.tostring(root, utf-8)
    reared_content = minidom.parseString(rough_string)
    with open(out_file, w+) as fs:
        reared_content.writexml(fs, addindent=" ", newl="\n", encoding="utf-8")
    return True

if __name__ == __main__:
    in_files = r"D:\baspool_read.xml"
    out_file = r"D:\baspool_out.xml"
    tree = read_xml(in_files)
    node_new = creat_dict(tree.getroot())  # 将xml转换为dict
    root = dict_to_xml(node_new, "baspools", "bas")  # 将dict转换为xml
    out_xml(root)     # 输出xml到out_files
end = time.clock()
print("read: %f s" % (end - start))

 

 

python xml解析和生成

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原文地址:http://www.cnblogs.com/jonyq/p/5929073.html

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