python 創建txt並且寫入做追加

import os
def create_str_to_txt(self,date,str_data):
    """
    創建txt，並且寫入
    """
    path_file_name = './report/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('日期','數據')