simple python todo

donetodo.py

import tempfile
import os

if "__main__" == __name__:
    with open("sample.todo") as file:
        raw_data = file.read()
        data_list = raw_data.split("\n")
        if data_list[4]:
            del data_list[4]
            temp_file_name = str(tempfile.mkstemp()[1])
            with open(temp_file_name, "w") as temp_file:
                for data in data_list:
                    temp_file.write(data + "\n")
                os.rename(temp_file_name, "sample.todo")

readtodo.py

if "__main__" == __name__:
    with open("sample.todo","r") as file:
        data_raw = file.read()
        data_list = data_raw.split("\n")
        for data in data_list:
            print(data)

writetodo.py

if "__main__" == __name__:
    with open("sample.todo","a") as file:
        file.writelines("new todo"+"\n")