python 创建txt并且写入做追加

原文出处：https://www.cnblogs.com/zhaoyingjie/p/8780383.html 
import os
import datetime
def create_str_to_txt(date,str_data):
    """
    创建txt，并且写入
    """
    path_file_name = './action_{}.txt'.format(date)
    if not os.path.exists(path_file_name):
        with open(path_file_name, "w") as f:
            print(f)

    with open(path_file_name, "a") as f:
        f.write(str_data)

if __name__ == '__main__':
    create_str_to_txt(  datetime.datetime.now().strftime('%Y-%m-%d'),'123')

 不追加模式。覆盖写法w+

https://www.runoob.com/python/file-methods.html  参考菜鸟教程python 对file的处理