[BUG] Live with RichHandler logging flickering

[xbeastx]

• I've checked docs and closed issues for possible solutions.
• I can't find my issue in the FAQ.

Describe the bug

When using Live and RichHandler sometimes it's temporary broke the things and restore back in a few milliseconds. But it could be seen.

This is video from CMD:

video.mp4

Here is 3 frames one by one:

This is even worse on Windows Terminal as it's flickering each log output when panel reach bottom of the window:

video_winterm.mp4

Looks like new log line bottoming Panel out of the terminal than it's restoring it. May be it's separated bugs...

Code example

Click to expand

import logging
import random
import string
import time
from threading import Thread

from rich.console import Group
from rich.live import Live
from rich.logging import RichHandler
from rich.panel import Panel
from rich.text import Text

logger = logging.getLogger(__name__)


def random_log():
    def random_word():
        return "".join(random.choice(string.ascii_letters) for _ in range(random.randint(3, 15)))

    while True:
        message = " ".join(random_word() for _ in range(random.randint(3, 10)))
        logger.info(message)
        time.sleep(random.uniform(0, 0.1))


def main():
    logging.basicConfig(
        level="NOTSET", format="%(message)s", datefmt="[%X]",
        handlers=[RichHandler(show_path=False, omit_repeated_times=False)]
    )

    progress_group = Group(
        Text("33333"),
        Text("2222222222"),
        Text("1111111111111"),
    )
    panel = Panel(progress_group)

    thread1 = Thread(target=random_log)
    with Live(panel, refresh_per_second=4) as _live:
        thread1.start()
        while True:
            thread1.join()


if __name__ == '__main__':
    try:
        main()
    except KeyboardInterrupt:
        print("Interrupted by user")

Platform

Click to expand

>venv\Scripts\python.exe -m rich.diagnose
+---------------------- <class 'rich.console.Console'> -----------------------+
| A high level console interface.                                             |
|                                                                             |
| +-------------------------------------------------------------------------+ |
| | <console width=79 None>                                                 | |
| +-------------------------------------------------------------------------+ |
|                                                                             |
|     color_system = None                                                     |
|         encoding = 'cp1252'                                                 |
|             file = <_io.TextIOWrapper name='<stdout>' mode='w'              |
|                    encoding='cp1252'>                                       |
|           height = 25                                                       |
|    is_alt_screen = False                                                    |
| is_dumb_terminal = False                                                    |
|   is_interactive = False                                                    |
|       is_jupyter = False                                                    |
|      is_terminal = False                                                    |
|   legacy_windows = True                                                     |
|         no_color = False                                                    |
|          options = ConsoleOptions(                                          |
|                        size=ConsoleDimensions(width=79, height=25),         |
|                        legacy_windows=True,                                 |
|                        min_width=1,                                         |
|                        max_width=79,                                        |
|                        is_terminal=False,                                   |
|                        encoding='cp1252',                                   |
|                        max_height=25,                                       |
|                        justify=None,                                        |
|                        overflow=None,                                       |
|                        no_wrap=False,                                       |
|                        highlight=None,                                      |
|                        markup=None,                                         |
|                        height=None                                          |
|                    )                                                        |
|            quiet = False                                                    |
|           record = False                                                    |
|         safe_box = True                                                     |
|             size = ConsoleDimensions(width=79, height=25)                   |
|        soft_wrap = False                                                    |
|           stderr = False                                                    |
|            style = None                                                     |
|         tab_size = 8                                                        |
|            width = 79                                                       |
+-----------------------------------------------------------------------------+
+--- <class 'rich._windows.WindowsConsoleFeatures'> ----+
| Windows features available.                           |
|                                                       |
| +---------------------------------------------------+ |
| | WindowsConsoleFeatures(vt=False, truecolor=False) | |
| +---------------------------------------------------+ |
|                                                       |
| truecolor = False                                     |
|        vt = False                                     |
+-------------------------------------------------------+
+------ Environment Variables -------+
| {                                  |
|     'TERM': None,                  |
|     'COLORTERM': None,             |
|     'CLICOLOR': None,              |
|     'NO_COLOR': None,              |
|     'TERM_PROGRAM': None,          |
|     'COLUMNS': None,               |
|     'LINES': None,                 |
|     'JUPYTER_COLUMNS': None,       |
|     'JUPYTER_LINES': None,         |
|     'JPY_PARENT_PID': None,        |
|     'VSCODE_VERBOSE_LOGGING': None |
| }                                  |
+------------------------------------+
platform="Windows"

>venv\Scripts\pip.exe freeze | findstr /C:"rich"
rich==13.6.0

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