修改class编号

import os
 
def replace_category(file_path, target_category, new_category):
    lines = []
    with open(file_path, 'r') as file:
        lines = file.readlines()
 
    new_lines = []
    for line in lines:
        parts = line.split(' ')
        category = int(parts[0])
        if category == target_category:
            parts[0] = str(new_category)
        new_line = ' '.join(parts)
        new_lines.append(new_line)
 
    with open(file_path, 'w') as file:
        file.writelines(new_lines)
 
def modify_yolo_txt_files(folder_path, target_category, new_category):
    for filename in os.listdir(folder_path):
        if filename.endswith('.txt'):
            file_path = os.path.join(folder_path, filename)
            replace_category(file_path, target_category, new_category)
 
folder_path = r'E:\cigarette_face-detection.v3i.yolov8\test\labels'
target_category = 0
new_category = 2
 
modify_yolo_txt_files(folder_path, target_category, new_category)