apowers313•8h ago

Controlling output of long-running process?

My code creates a long-running thread in the background and I'd like to have all the output of the thread go to a single cell. Currently just the first message goes to the cell. Demo code:

 python
from threading import Thread
import time

def long_running():
    print("Thread starting:")
    i = 0
    while True:
        print(f"Loop {i}...")
        i += 1
        time.sleep(1)
    print("Thread exiting.")

t = Thread(target=long_running)
t.start()

 python
from threading import Thread
import time

def long_running():
    print("Thread starting:")
    i = 0
    while True:
        print(f"Loop {i}...")
        i += 1
        time.sleep(1)
    print("Thread exiting.")

t = Thread(target=long_running)
t.start()

Is there any way to capture the output from my thread in a specific cell? (side note: this code also seems to cause auto export to raise an exception)

3 Replies

Hall•8h ago

Someone will reply to you shortly. In the meantime, this might help:

apowers313OP•8h ago

seems like a duplicate of: https://github.com/marimo-team/marimo/issues/2642

GitHub

Thread-local runtime context makes I/O methods not work in notebook...

Describe the bug The runtime context is a threadlocal, which was convenient for us when running marimo notebooks as apps (each session runs in its own thread). This however means that I/O doesn&#39...

apowers313OP•8h ago

apparently the AI is better at finding related issues than I am 😉 I take it back, even mo.Thread doesn't capture the output

Controlling output of long-running process?

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