因项目需要根据指定格式的文件生成XML标注文件，可以方便使用LabelImg打开进行编辑和查看。其原始文件默认使用逗号进行分隔，如下所示：

第1个值：原始图片中切图小文件，以AIpng_x，其中x代表原始图片的第几个切图文件

第2~5值：分别对应于ymin, xmin, ymax, xmax

第6个值：代表对应的标签标注

在生成XML文件时，需要对其进行汇总，即将属于同一个原始文件的切图小文件的标注汇总到一起，其实现代码如下所示：

import os

from Logger import MyLogger

from xml.dom.minidom import Document

from collections import defaultdict

import re

class OpeateXML:

def __init__(self, srcPath: str, targetPath: str, srcFileName: str):

self._srcPath = srcPath

self._targetPath = targetPath

self._srcFileName = srcFileName

def readSrcFileName(self, fileEncoding="utf8") -> dict:

data = defaultdict(list)

s = re.compile("\.AIpng_\d{1,}", re.IGNORECASE)

srcFileFullPath = os.path.join(self._srcPath, self._srcFileName)

try:

with open(srcFileFullPath, mode="r", encoding=fileEncoding, errors="ignore") as fr:

for content in fr.readlines():

data[s.sub(".AIpng",content.strip().split(",")[0])].append(content.strip())

except Exception as ex:

MyLogger().error(f"OperateXML:read file error:\n{ex}")

return {}

else:

# data.sort(key=lambda x: x.strip().split(",")[0])

return data

def createXML(self, data: dict, fileEncoding="utf8"):

if data:

try:

for k,v in data.items():

doc = Document()

# 创建根节点

rootNode = doc.createElement("annotation")

# 添加根节点

doc.appendChild(rootNode)

folder = doc.createElement("folder")

folderText = doc.createTextNode(self._targetPath)

folder.appendChild(folderText)

rootNode.appendChild(folder)

filename = doc.createElement("filename")

filenameText = doc.createTextNode(k)

filename.appendChild(filenameText)

rootNode.appendChild(filename)

path = doc.createElement("path")

pathText = doc.createTextNode(os.path.join(self._targetPath,k))

path.appendChild(pathText)

rootNode.appendChild(path)

for i in v:

tmpData = i.strip().split(",")

if len(tmpData) == 6:

_, ymin, xmin, ymax, xmax, labelName = tmpData

objectObj = doc.createElement("object")

rootNode.appendChild(objectObj)

objectName = doc.createElement("name")

objectNameText = doc.createTextNode(labelName)

objectName.appendChild(objectNameText)

objectObj.appendChild(objectName)

objectBndBox = doc.createElement("bndbox")

objectObj.appendChild(objectBndBox)

objectBndBoxXmin = doc.createElement("xmin")

objectBndBoxYmin = doc.createElement("ymin")

objectBndBoxXmax = doc.createElement("xmax")

objectBndBoxYmax = doc.createElement("ymax")

objectBndBoxXminText = doc.createTextNode(xmin)

objectBndBoxYminText = doc.createTextNode(ymin)

objectBndBoxXmaxText = doc.createTextNode(xmax)

objectBndBoxYmaxText = doc.createTextNode(ymax)

objectBndBox.appendChild(objectBndBoxXmin)

objectBndBox.appendChild(objectBndBoxYmin)

objectBndBox.appendChild(objectBndBoxXmax)

objectBndBox.appendChild(objectBndBoxYmax)

objectBndBoxXmin.appendChild(objectBndBoxXminText)

objectBndBoxYmin.appendChild(objectBndBoxYminText)

objectBndBoxXmax.appendChild(objectBndBoxXmaxText)

objectBndBoxYmax.appendChild(objectBndBoxYmaxText)

objectObj.appendChild(objectBndBox)

else:

continue

# save xml

xmlName=os.path.splitext(k)[0]+".xml"

targetPath = os.path.join(self._targetPath, xmlName)

with open(targetPath, mode="w", encoding=fileEncoding) as fw:

doc.writexml(fw, indent="\t", newl="\n", addindent="\t", encoding=fileEncoding)

except Exception as ex:

MyLogger().error(f"OperateXML:Save xml error\n{ex}")

return

if __name__ == '__main__':

srcPath = r"C:\Users\Surpass\Documents\PycharmProjects\data\TEST-8\outs"

srcName = "locations.txt"

targetPath = r"C:\Users\Surpass\Documents\PycharmProjects\data\TEST-8\outs\in_number"

operateXML = OpeateXML(srcPath, targetPath, srcName)

a = operateXML.readSrcFileName()

operateXML.createXML(a)

最终生成的XML效果如下所示：

在LabelImg中的效果如下所示：

PS：这里再为大家提供几款关于xml操作的在线工具供大家参考使用：

对关于Python生成XML相关内容感兴趣的读者可查看本站专题：《Python操作xml数据技巧总结》

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