Log to Jupyter widget

LogWidget.py

import ipywidgets as widgets
import os
import sys
import threading

class LogWidget:
    def __init__(self):
        layout = {
            'width': '100%',
            'height': '160px',
            'border': '1px solid black'
        }
        self.out = widgets.Output(layout=layout)
        self.saved_handle = os.dup(1)
        pipe_read, pipe_write = os.pipe()
        os.dup2(pipe_write, 1)
        os.close(pipe_write)
        def consumer_thread(f, widget):
            while True:
                buf = os.read(f, 1024)
                if not buf:
                    break
                with widget:
                    print(buf.decode("utf-8", "strict"))
            os.close(f)
            return
        self.thread = threading.Thread(target=consumer_thread, args=(pipe_read, self.out))
        self.thread.start()
        display(self.out)

    def stop(self):
        os.dup2(self.saved_handle, 1)
        os.close(self.saved_handle)
        self.thread.join()