human
I am working on the file "Python/11_Progress.ipynb".
The first task is:
A Reusable class for IPython Progress
There currently are too many caveats without support for Abort. Let us create a reusable class which will automatically generate the UUID and just display the progress.
Can you write Python code for it?
assistant
#Here is the Python code you requested.

import uuid
from IPython.display import HTML, Javascript, display

class HTMLProgressWatcher:
    def __init__(self, po):
        self.processObject = po
        self.abort = False

        po.AddCommand(sitk.sitkStartEvent, lambda: self.cmdStartEvent())
        po.AddCommand(sitk.sitkProgressEvent, lambda: self.cmdProgressEvent())
        po.AddCommand(sitk.sitkEndEvent, lambda: self.cmdEndEvent())

    def cmdStartEvent(self):
        global sitkIPythonProgress_UUID
        self.abort = False
        self.divid = str(uuid.uuid4())

        try:
            sitkIPythonProgress_UUID[self.divid] = self
        except NameError:
            sitkIPythonProgress_UUID = {self.divid: self}

        html_progress_abort = f"""
<p style="margin:5px">{self.processObject.GetName()}:</p>
<div style="border: 1px solid black;padding:1px;margin:5px">
  <div id="{self.divid}" style="background-color:blue; width:0%%">&nbsp;</div>
</div>
"""

        display(HTML(html_progress_abort + javascript_abort))

    def cmdProgressEvent(self):
        p = self.processObject.GetProgress()
        display(Javascript("$('div#%s').width('%i%%')" % (self.divid, int(p * 100))))
        if self.abort:
            self.processObject.Abort()

    def cmdEndEvent(self):
        global sitkIPythonProgress_UUID
        del sitkIPythonProgress_UUID[self.divid]
        del self.divid

filter.RemoveAllCommands()
watcher = HTMLProgressWatcher(filter)

filter.Execute()

?threading.Thread.start