对python修改xml文件的节点值方法详解

<"htmlcode">

__author__ = 'Sam'
 
import cv2
import xml.etree.ElementTree as ET
import os
import sys
import lxml
import shutil
 
#user input files path
path="E:/test_folder"
image_path = path + "/Annotations/" #image path with .jpg ending
label_path = path + "/JPEGImages/" #label path with .xml ending
min_size=800
 
def search_jpg_xml(image_dir,label_dir):
  #find out all of sepecified file
  image_ext='.jpg'
  img=[fn for fn in os.listdir(image_dir) if fn.endswith(image_ext)]
  label_ext='.xml'
  label=[fn for fn in os.listdir(label_dir) if fn.endswith(label_ext)]
  return img, label
 
def copyfile():
  if "Annotations_temp" in os.listdir(path):
    shutil.rmtree(path+"/Annotations_temp")
  if "JPEGImages_temp" in os.listdir(path):
    shutil.rmtree(path+"/JPEGImages_temp")
  save_annotation_path=path+"/Annotations_temp/"
  save_jpg_path=path+"/JPEGImages_temp/"
  shutil.copytree(path + "/Annotations",save_annotation_path)
  shutil.copytree(path + "/JPEGImages", save_jpg_path)
  return save_jpg_path ,save_annotation_path
 
def write_xml_jpg(jpg_path,annotation_path):
  img,label=search_jpg_xml(jpg_path,annotation_path)
  sorted(img)
  sorted(label)
  print(img)
  print(label)
  if "Annotations_1" not in os.listdir(path):
    os.mkdir(path+"/Annotations_1")
  if "JPEGImages_1" not in os.listdir(path):
    os.mkdir(path+"/JPEGImages_1")
  new_image_path=path+"/JPEGImages_1/"
  new_annotation_path=path+"/Annotations_1/"
  for index,file in enumerate(label):
    cur_img = cv2.imread(jpg_path+img[index])
    width=cur_img.shape[1]
    height=cur_img.shape[0]
    if width<height:
      new_width=min_size
      new_height=int(min_size*height/width)
      w_ratio=new_width/width
      h_ratio=new_height/height
    elif width>height:
      new_width=int(min_size*width/height)
      new_height=min_size
      w_ratio=new_width/width
      h_ratio=new_height/height
    elif width==height:
      new_width=min_size
      new_height=min_size
      w_ratio=new_width/width
      h_ratio=new_height/height
    cur_img = cv2.resize(cur_img, (new_width, new_height))
    cv2.imwrite(new_image_path+img[index],cur_img)
    cur_xml = ET.parse(annotation_path+file)
    root = cur_xml.getroot()
    for node in root:
      if node.tag=='size':
        node[0].text=str(new_width)
        node[1].text=str(new_height)
      elif node.tag=='object':
         xmin=int(node[4][0].text)#bbox position
         ymin=int(node[4][1].text)
         xmax=int(node[4][2].text)
         ymax=int(node[4][3].text)
         node[4][0].text=str(int(xmin*w_ratio))
         node[4][1].text=str(int(ymin*h_ratio))
         node[4][2].text=str(int(xmax*w_ratio))
         node[4][3].text=str(int(ymax*h_ratio))
    cur_xml.write(new_annotation_path+file)
  shutil.rmtree(path+"/JPEGImages_temp")
  shutil.rmtree(path+"/Annotations_temp")
 
 
if __name__ == "__main__":
  jpg_path,annotation_path=copyfile()
  write_xml_jpg(jpg_path,annotation_path)
 


最关键语句是：
node[4][3].text=str(int(ymax*h_ratio))，注意xml节点的操作是字符型！！!
以上这篇对python修改xml文件的节点值方法详解就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。