python读取XML文件_python xml getattribute

关键概念：element；tag；attribute；data
关键函数：parse；documentElement；getElementByTagName；getAttribute

import xml.dom.minidom as xmldom


a_file = xmldom.parse('C:/Users\LOI5WX\Desktop/parameter_compare/parameter_compare/X01_padfco_x.xml')
b_file = xmldom.parse('C:/Users\LOI5WX\Desktop\parameter_compare\parameter_compare\M01B_padfco_x.xml')
a_elements= a_file.documentElement
b_elements=b_file.documentElement
a_element_list = a_elements.getElementsByTagName("parameter")
b_element_list= b_elements.getElementsByTagName("parameter")

a1=[]
a2=[]
#a1为两个表中不同的
#a2为第二个表中没有的

for i in range(len(a_element_list)):
    a_parameter_name=a_element_list[i].getAttribute('parametername')
    a_value_data=a_element_list[i].getElementsByTagName('valuedata')[0].getAttribute('physicalValue')
    k=1
    for j in range(len(b_element_list)):
        b_parameter_name=b_element_list[j].getAttribute('parametername')
        b_value_data=b_element_list[j].getElementsByTagName('valuedata')[0].getAttribute('physicalValue')
        if a_parameter_name==b_parameter_name:
            if a_value_data!=b_value_data:
                a1.append(a_parameter_name)
            k=0
    if k==1:
        a2.append(a_parameter_name)
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