数据处理：txt文件中删除首位数字对应的行 并且存在空行去除空行

# import cv2
from tqdm import tqdm
import os
label_path = r'C:\Users\yewenjing\Desktop\1112'
out_path = r'C:\Users\yewenjing\Desktop\222221'
for fliename in tqdm(os.listdir(label_path)):
    if fliename.endswith('.txt'):
        # img = cv2.imread(os.path.join(img_path,fliename))
        with open(os.path.join(label_path,fliename), 'r') as f:
            lines = f.readlines()
        new_lines = []
        for line in lines:
            if not line.startswith('0'):
                new_lines.append(line.strip())

        # 删除行之间的空行
        # new_lines = [x for x in new_lines if x]
        # 将结果写回文件
        with open(os.path.join(out_path,fliename), 'w') as f:
            f.write('\n'.join(new_lines))