Output widget loses some output

I’m using version 7.4.2

import ipywidgets as widgets

output = widgets.Output()
field = widgets.Text()
updating = False

def update(change):
    global updating
    with output:
        if not updating:
            updating = True
            print('updating value')
            field.value = 'a' + change.new
            print('finished updating value')
            updating = False
            
field.observe(update, names='value')
field.value = 'b'

After running this, the Output widget only contains updating value. The text finished updating value is printed in the output area below the notebook cell.

To fix it, I can add an additional context

def update(change):
    global updating
    with output:
        if not updating:
            updating = True
            print('updating value')
            field.value = 'a' + change.new
            with output:
                print('finished updating value')
            updating = False

Here, the Output widget contains

updating value
finished updating value

as expected.

[krey]

Hmm, this seems to work

@contextmanager
def output_widget_context(widget):
    if widget.msg_id == '':
        with widget:
            yield
    else:
        yield

[SylvainCorlay]

This appears to be solved in #2384. Closing.