Python Threading.timer（）

Question

我试图在一段时间后执行一个功能。 时间间隔由Ftp服务器记事本文件控制。 用户更新记事本文件，该文件在一段时间后更新时间间隔。 但它不起作用它在启动时读取记事本文件中的数据并且threading.timer使用旧时它不更新代码甚至我们改变了记事本文件中的数据

def Dataflow():        
    try:
        ftp = FTP('Domain')
        ftp.login('username', 'password')
        ftp.cwd('/directory where notepad file is saved')

        server_file='control.txt' #The Text file that will control the data flow

        local_file=r'C:\Users\Public\flow.txt' #The Local location of file which will catch data
        ftp.retrbinary('RETR ' + server_file , open(local_file, 'wb').write)  # To download the Dataflow rate from the notepad in ftp server
        local_file = open(r'C:\Users\Public\flow.txt','r')
        temp_store = int(local_file.read(20)) #storing the data of notepad file in variable
        local_file.close(); ftp.close()
        return temp_store
    except:
        pass

def function():
           do something 

time = threading.timer(Dataflow(), function)
time.start()