clearing last dumped text from terminal by flushing stdout

Question

Hi I kind of forgot in past I remember having done clearing out the last printed text in terminal doesnt seems to work how I am doing now

def main():

    print 'starting...'

    baseURL = 'https://api.thingspeak.com/update?api_key=%s' % myAPI
    print baseURL

    while True:
        try:
            RHW, TW, TWF = getSensorData()
            # LT = RCtime(RCpin)
            f = urllib2.urlopen(baseURL + 
                                "&field1=%s&field2=%s&field3=%s" % (TW, TWF, RHW))

            sys.stdout.flush()
            sys.stdout.write("Celcius: %s , Farenheit: %s , Humidity: %s "% (TW, TWF, RHW))
            f.close()


            sleep(int(myDelay))
        except:
            print 'exiting.'
            break

Can anyone please through some light ?

score 0 · Accepted Answer · answered Oct 03 '16 at 16:49

if you actually want to clear the screen you should use curses or ncurses

some hacks however are

\b backspace character ... allows you to write over the last character
\r carriage return without newline ... this will move the curser to the start of the current line in most terminals (allowing you to "overwrite" the current line) ...
there are also some crazy hex escape codes that are very terminal specific

os.system('cls') or os.system('clear') will sort of work depending on your operating system

if you just want to flush the current stdout that is simply sys.stdout.flush()

clearing last dumped text from terminal by flushing stdout

1 Answers1