是把對應的csv打開了，關閉之后運行就沒問題，
把一個csv文件打亂順序拆分為指定百分比的訓練集和測試集，實現如下：

import csv import os import randomdef split_csv(path, total_len, per):# 如果train.csv和vali.csv存在就刪除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存放路徑csv_path = os.path.join("E:\\Server", 'U2S_fake_face_test_0909_train.csv')# print(csv_path)# 不存在此文件的時候，就創建if not os.path.exists(csv_path):with open(csv_path, 'w', newline='') as file:csvwriter = csv.writer(file)csvwriter.writerow(ind)i += 1# 存在的時候就往里面添加else:with open(csv_path, 'a', newline='') as file:csvwriter = csv.writer(file)csvwriter.writerow(ind)i += 1else:# vali.csv存放路徑csv_path = os.path.join("E:\\Server", 'U2S_fake_face_test_0909_test.csv')# print(csv_path)# 不存在此文件的時候，就創建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("訓練集和驗證集分離成功")return if __name__ == '__main__':path = "E:/Server/U2S_fake_face_test_0909.csv"total_len = len(open(path, 'r').readlines())# csv文件行數per = 59# 分割比例%split_csv(path, total_len, per)

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