csv追加写入的时候报错Permission denied

是把对应的csv打开了，关闭之后运行就没问题，
把一个csv文件打乱顺序拆分为指定百分比的训练集和测试集，实现如下：

import csv
import os
import randomdef split_csv(path, total_len, per):# 如果train.csv和vali.csv存在就删除if os.path.exists('E:/Server/U2S_fake_face_test_0909_train.csv'):os.remove('E:/Server/U2S_fake_face_test_0909_train.csv')if os.path.exists('E:/Server/U2S_fake_face_test_0909_test.csv'):os.remove('E:/Server/U2S_fake_face_test_0909_test.csv')with open(path, 'r', newline='') as file:csvreader = csv.reader(file)train_num = round(total_len * per / 100)index = random.sample(list(range(total_len)), train_num)print('index', len(index), index,)i = 0for ind in csvreader:if i in index:# train.csv存放路径csv_path = os.path.join("E:\\Server", 'U2S_fake_face_test_0909_train.csv')# print(csv_path)# 不存在此文件的时候，就创建if not os.path.exists(csv_path):with open(csv_path, 'w', newline='') as file:csvwriter = csv.writer(file)csvwriter.writerow(ind)i += 1# 存在的时候就往里面添加else:with open(csv_path, 'a', newline='') as file:csvwriter = csv.writer(file)csvwriter.writerow(ind)i += 1else:# vali.csv存放路径csv_path = os.path.join("E:\\Server", 'U2S_fake_face_test_0909_test.csv')# print(csv_path)# 不存在此文件的时候，就创建if not os.path.exists(csv_path):with open(csv_path, 'w', newline='') as file:csvwriter = csv.writer(file)csvwriter.writerow(ind)i += 1else:with open(csv_path, 'a', newline='') as file:csvwriter = csv.writer(file)csvwriter.writerow(ind)i += 1print("训练集和验证集分离成功")return
if __name__ == '__main__':path = "E:/Server/U2S_fake_face_test_0909.csv"total_len = len(open(path, 'r').readlines())# csv文件行数per = 59# 分割比例%split_csv(path, total_len, per)

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csv追加写入的时候报错Permission denied

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