1、项目中，数据集的类别顺序有时会改变，例如a项目类别1是b项目的类别3，，需要用a项目的数据集，只需要改类别就行，就不需要重新标注了，例如a项目的classes是

b项目的classes是

a项目的数据可以用到b项目，得a项目的类别改成b项目一致，这里就需要把1改成3，2改成5

import osdef gai_labels(labels_path, new_labels_path):# 获取labels_path文件夹中所有的文件labels_files = os.listdir(labels_path)# 如果new_labels_path文件夹不存在，则创建if not os.path.exists(new_labels_path):os.makedirs(new_labels_path)# 遍历每个标签文件for labels_file in labels_files:# 生成标签文件的完整路径file_path = os.path.join(labels_path, labels_file)# 创建新的文件路径new_file_path = os.path.join(new_labels_path, labels_file)# 读取标签文件内容并修改类别with open(file_path, 'r') as f:lines = f.readlines()new_lines = []for line in lines:parts = line.strip().split()# 修改类别1为3，类别2为5,类别3改成4if parts[0] == '1':parts[0] = '3'# elif parts[0] == '2':#     parts[0] = '5'new_lines.append(" ".join(parts) + '\n')# 将修改后的内容写入新的文件with open(new_file_path, 'w') as f:f.writelines(new_lines)if __name__ == "__main__":labels_path = r"E:\project\CODE\labels"new_labels_path = r"E:\project\CODE\gaihou"gai_labels(labels_path, new_labels_path)

0 0.070312 0.476042 0.137500 0.164583
1 0.518750 0.760417 0.103125 0.116667
2 0.200781 0.643750 0.139063 0.170833
0 0.307812 0.527083 0.106250 0.145833
1 0.392969 0.240625 0.085938 0.110417
2 0.328906 0.075000 0.117188 0.145833改后
0 0.070312 0.476042 0.137500 0.164583
3 0.518750 0.760417 0.103125 0.116667
5 0.200781 0.643750 0.139063 0.170833
0 0.307812 0.527083 0.106250 0.145833
3 0.392969 0.240625 0.085938 0.110417
5 0.328906 0.075000 0.117188 0.1458332、删除类别0，类别1，类别2，类别4，类别5,只留下类别3的标签,代码如下：

import osdef del_labels(labels_path, new_labels_path):# 获取labels_path文件夹中所有的文件labels_files = os.listdir(labels_path)# 如果new_labels_path文件夹不存在，则创建if not os.path.exists(new_labels_path):os.makedirs(new_labels_path)# 遍历每个标签文件for labels_file in labels_files:# 生成标签文件的完整路径file_path = os.path.join(labels_path, labels_file)# 创建新的文件路径new_file_path = os.path.join(new_labels_path, labels_file)# 读取标签文件内容并过滤指定类别with open(file_path, 'r') as f:lines = f.readlines()new_lines = []for line in lines:parts = line.strip().split()# 跳过类别为0、1、2、4、5的行if parts[0] in {'0', '1', '2', '4', '5'}:continuenew_lines.append(" ".join(parts) + '\n')# 将过滤后的内容写入新的文件with open(new_file_path, 'w') as f:f.writelines(new_lines)if __name__ == "__main__":labels_path = r"E:\project\CODE\labels"new_labels_path = r"E:\project\CODE\del_hou"del_labels(labels_path, new_labels_path)

删除后