您可以检查文件是否已经存在，然后不调用，
writeheader()因为您使用附加选项打开文件。
像这样：
import os.pathfile_exists = os.path.isfile(filename)with open (filename, 'a') as csvfile: headers = ['TimeStamp', 'light', 'Proximity'] writer = csv.DictWriter(csvfile, delimiter=',', lineterminator='n',fieldnames=headers) if not file_exists: writer.writeheader() # file doesn't exist yet, write a header writer.writerow({'TimeStamp': dic['ts'], 'light': dic['light'], 'Proximity': dic['prox']})
