For my current project, there are some pieces of code that are slow and which I can't make faster. To get some feedback how much was done / has to be done, I've created a progress snippet which you can see below.

When you look at the last line

sys.stdout.write("\r100%" + " "*80 + "\n")

I use " "*80 to override eventually remaining characters. Is there a better way to clear the line?

(If you find the error in the calculation of the remaining time, I'd also be happy. But that's the question.)

Progress snippet

#!/usr/bin/env pythonimport time
import sys
import datetimedef some_slow_function():start_time = time.time()totalwork = 100for i in range(totalwork):# The slow parttime.sleep(0.05)if i > 0:# Show how much work was done / how much work is remainingpercentage_done = float(i)/totalworkcurrent_running_time = time.time() - start_timeremaining_seconds = current_running_time / percentage_donetmp = datetime.timedelta(seconds=remaining_seconds)sys.stdout.write("\r%0.2f%% (%s remaining)   " %(percentage_done*100, str(tmp)))sys.stdout.flush()sys.stdout.write("\r100%" + " "*80 + "\n")sys.stdout.flush()if __name__ == '__main__':some_slow_function()

Consoles

I use ZSH most of the time, sometimes bash (and I am always on a Linux system)

Try using the ANSI/vt100 "erase to end of line" escape sequence:

sys.stdout.write("\r100%\033[K\n")

Demonstration:

for i in range(4):sys.stdout.write("\r" + ("."*i*10))sys.stdout.flush()if i == 3:sys.stdout.write("\rDone\033[K\n")time.sleep(1.5)

Reference: https://en.wikipedia.org/wiki/ANSI_escape_code#CSI_sequences