[FIXED] Why doesn't print() work in Visual Studio Code?

Issue

I'm trying to make a while True-loop that repeatedly prints a string:

from time import sleep
while True:
    sleep(1)
    print("test", end="")

But it doesn't print anything when running it with VSC. Running it with the IDLE works for me, a friend also tried it and for him, it's the other way round.

Why does this happen?

Solution

Python's stdout is buffered, meaning that prints to stdout don't appear on the console until a newline is printed, the buffer is full, or if the buffer is flushed.

You have three options:

1. Get rid of the end parameter in the print() statement, as print() statements implicitly add newlines.
2. Flush the buffer using sys.stdout.flush():

import sys
from time import sleep

while True:
    sleep(1)
    print("test", end="")
    sys.stdout.flush()

3. Use flush=True in the print() statement.

Answered By - BrokenBenchmark

Answer Checked By - Terry (PHPFixing Volunteer)