cmd displaying output only after program has finished

Question

I have a problem with my python program, it is supposed to print each character individually with a delay in between. Here is my code:

import time
import os
txt=open("text",'r').read()
delay=0.25
bg,fg=0,2
os.system("color "+str(bg)+str(fg))
for i in txt:
    print(i,end='')
    time.sleep(delay)

But when run in cmd it waits until the program is done THEN shows the output. How can i make this work?

*the "text" file just contains "hello"

Does this answer your question? [How to flush output of print function?](https://stackoverflow.com/questions/230751/how-to-flush-output-of-print-function) — Héliton Martins, Nov 15 '20 at 19:47
Using `flush=True` does exactly what you asked. Can you please edit your question and point out *exactly* what you want? — Héliton Martins, Nov 15 '20 at 19:51
It flushes the output. That's what you're asking for. `print` is buffered output. — Thomas Sablik, Nov 15 '20 at 19:53
i want it to print one charachter at a time with a delay in between each print — jackedak, Nov 15 '20 at 19:53

score 1 · Answer 1 · answered Nov 15 '20 at 19:59

1

print is buffered output. It's not immediately printed but stored and printed later. With flush=True you can flush the buffer and immediately write the buffer to the terminal.

answered Nov 15 '20 at 19:59

Thomas Sablik

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cmd displaying output only after program has finished

1 Answers1