创建csv文件,追加数据前先判断是否存在该csv文件
例子
import csv
import os
csv_header = ['time', 'temp', 'gas']
file_name = 'model_data.csv'
if not os.path.exists(file_name): #文件不存在
with open(file_name, 'w', encoding='utf8', newline='') as file:
writer = csv.writer(file)
writer.writerow(csv_header)
with open(file_name, 'a+', encoding='utf8', newline='') as file:
writer = csv.writer(file)
writer.writerow([1, 10, 20])
writer.writerow([2, 11, 20])
追加数据,注意open()中要以'a+'模式打开。
不留数据空白行,指定参数newline=''