1. xml例子
<?xml version="1.0" encoding="UTF-8"?>
<annotation>
<folder>VOC2007</folder>
<filename>01240001.jpg</filename>
</object>
<object>
<name>like</name>
<pose>Unspecified</pose>
<bndbox>
<xmin>211</xmin>
<ymin>152</ymin>
<xmax>239</xmax>
<ymax>194</ymax>
</bndbox>
</object>
</annotation>
2.xml读
举个读box中xmin、xmax、ymin、ymax以及类名的例子:
import xml.dom.minidom
dom = xml.dom.minidom.parse( xml_path ) #用于打开一个xml文件,并将这个文件对象dom变量。
root = dom.documentElement #用于得到dom对象的文档元素,并把获得的对象给root
name_lst = []
lst_temp = root.getElementsByTagName("name")
for i in range(len(lst_temp)):
l = lst_temp[i].firstChild.data
if l in class_name:
name_lst.append(l)
xmin_lst1 = root.getElementsByTagName("xmin")
ymin_lst1 = root.getElementsByTagName("ymin")
xmax_lst1 = root.getElementsByTagName("xmax")
ymax_lst1 = root.getElementsByTagName("ymax")
num = min(len(xmin_lst1), len(name_lst))
xmin_lst = []
xmax_lst = []
ymin_lst = []
ymax_lst = []
for i in range(num):
xmin = int(xmin_lst1[i].firstChild.data)
xmax = int(xmax_lst1[i].firstChild.data)
ymin = int(ymin_lst1[i].firstChild.data)
ymax = int(ymax_lst1[i].firstChild.data)
#print type(xmin_lst1[i].firstChild.data) #<type 'unicode'>
3. 写xml
# 创建dom文档
doc = Document()
# 创建根节点
orderlist = doc.createElement('annotation')
# 根节点插入dom树
doc.appendChild(orderlist)
# 每一组信息先创建节点<folder>,然后插入到父节点<orderlist>下
folder = doc.createElement('folder')
orderlist.appendChild(folder)
# 创建<folder>下的文本节点
folder_text = doc.createTextNode("VOC2007")
# 将文本节点插入到<folder>下
folder.appendChild(folder_text)
filename = doc.createElement('filename')
orderlist.appendChild(filename)
filename_text = doc.createTextNode(file)
filename.appendChild(filename_text)
for i in range(num):
object = doc.createElement('object')
orderlist.appendChild(object)
name = doc.createElement('name')
object.appendChild(name)
name_text = doc.createTextNode(name_lst[i])
name.appendChild(name_text)
pose = doc.createElement('pose')
object.appendChild(pose)
pose_text = doc.createTextNode("Unspecified")
pose.appendChild(pose_text)
#########
bndbox = doc.createElement('bndbox')
object.appendChild(bndbox)
xmin = doc.createElement('xmin')
bndbox.appendChild(xmin)
xmin_text = doc.createTextNode(str(xmin_lst[i]))
xmin.appendChild(xmin_text)
ymin = doc.createElement('ymin')
bndbox.appendChild(ymin)
ymin_text = doc.createTextNode(str(ymin_lst[i]))
ymin.appendChild(ymin_text)
xmax = doc.createElement('xmax')
bndbox.appendChild(xmax)
xmax_text = doc.createTextNode(str(xmax_lst[i]))
xmax.appendChild(xmax_text)
ymax = doc.createElement('ymax')
bndbox.appendChild(ymax)
ymax_text = doc.createTextNode(str(ymax_lst[i]))
ymax.appendChild(ymax_text)
with open(save_xml_dir + "/" + file[:len(file)-4] + ".xml", 'w') as f:
f.write(doc.toprettyxml(indent='\t', encoding='utf-8'))
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