python读取xml文件示例

最近用到了xml格式的文件，对这些没啥印象，顺便学习一下，做个例子，方便后续查阅。

xml文档：

 <annotation>
     <folder>VOC2012</folder>
     <filename>2007_000027.jpg</filename>
     <source>
         <database>The VOC2007 Database</database>
         <annotation>PASCAL VOC2007</annotation>
         <image>flickr</image>
     </source>
     <size>
         <width>486</width>
         <height>500</height>
         <depth>3</depth>
     </size>
     <segmented>0</segmented>
     <object>
         <name>person</name>
         <pose>Unspecified</pose>
         <truncated>0</truncated>
         <difficult>0</difficult>
         <bndbox>
             <xmin>174</xmin>
             <ymin>101</ymin>
             <xmax>349</xmax>
             <ymax>351</ymax>
         </bndbox>
         <part>
             <name>head</name>
             <bndbox>
                 <xmin>169</xmin>
                 <ymin>104</ymin>
                 <xmax>209</xmax>
                 <ymax>146</ymax>
             </bndbox>
         </part>
         <part>
             <name>hand</name>
             <bndbox>
                 <xmin>278</xmin>
                 <ymin>210</ymin>
                 <xmax>297</xmax>
                 <ymax>233</ymax>
             </bndbox>
         </part>
         <part>
             <name>foot</name>
             <bndbox>
                 <xmin>273</xmin>
                 <ymin>333</ymin>
                 <xmax>297</xmax>
                 <ymax>354</ymax>
             </bndbox>
         </part>
         <part>
             <name>foot</name>
             <bndbox>
                 <xmin>319</xmin>
                 <ymin>307</ymin>
                 <xmax>340</xmax>
                 <ymax>326</ymax>
             </bndbox>
         </part>
     </object>
 </annotation>

使用python代码读取里面的内容：

 #python3
 # -- coding: utf-8 --

 import numpy as np
 import xml.etree.ElementTree as ET

 et = ET.parse('test.xml')
 element = et.getroot()

 # 获取所有object对象
 element_objs = element.findall('object')
 # 图片文件名
 element_filename = element.find('filename').text
 print('element_filename:' , element_filename)
 element_width = int(element.find('size').find('width').text)
 element_height = int(element.find('size').find('height').text)

 if len(element_objs) > 0:
     for element_obj in element_objs:
         class_name = element_obj.find('name').text
         print('class_name:' , class_name)

         obj_bbox = element_obj.find('bndbox')
         x1 = int(round(float(obj_bbox.find('xmin').text)))
         y1 = int(round(float(obj_bbox.find('ymin').text)))
         x2 = int(round(float(obj_bbox.find('xmax').text)))
         y2 = int(round(float(obj_bbox.find('ymax').text)))
         print('(x1,y1,x2,y2):' , (x1 , y1 , x2 , y2))

每日一言：

无冥冥之志者，无昭昭之明，无昏昏之事者，无赫赫之功。

参考文档：https://blog.csdn.net/hanshuobest/article/details/78604704