统计VOC格式标签XML中的种类和各类别数目（从高到低）

import os
import xml.dom.minidom

xml_path = 'F:/data/Annotations/'
files = os.listdir(xml_path)

gt_dict = {}

if __name__ == '__main__':

    for xm in files:
        xmlfile = xml_path + xm
        dom = xml.dom.minidom.parse(xmlfile)  # 读取xml文档
        root = dom.documentElement  # 得到文档元素对象
        filenamelist = root.getElementsByTagName("filename")
        filename = filenamelist[0].childNodes[0].data
        objectlist = root.getElementsByTagName("object")
        ##
        for objects in objectlist:
            namelist = objects.getElementsByTagName("name")
            objectname = namelist[0].childNodes[0].data
            if objectname == '-':
                print(filename)
            if objectname in gt_dict:
                gt_dict[objectname] += 1
            else:
                gt_dict[objectname] = 1
            # for nl in namelist:
            #     objectname = nl.childNodes[0].data
            #     if objectname in gt_dict:
            #         gt_dict[objectname] += 1
            #     else:
            #         gt_dict[objectname] = 1
    dic = sorted(gt_dict.items(), key=lambda d: d[1], reverse=True)
    print(dic)
    print(len(dic))