[IronPython] IronPython and Threads

Dan Eloff dan.eloff at gmail.com
Mon Jun 9 02:20:59 CEST 2008

Ok I've been at this all day, and I've discovered some nifty things.
It was pretty trivial to redirect output to an html textarea. The html
markup/styling gave me way more trouble than the managed code (I
really hate html.)

The big find though was the Application.Current.UnhandledException event.

def excepthook(sender, e):
    print e.ExceptionObject

def startup():
    import sys
    sys.stdout = sys.stderr = DebugStream()

    Application.Current.UnhandledException += excepthook

    # start application


Which will print unhandled exceptions, even ones that occur in
background threads!

But of course this prints a .NET traceback, which is pretty much
useless for IronPython. But surely there is some way to print a python
exception once I have this .NET exception object?


On Sun, Jun 8, 2008 at 2:22 PM, Dan Eloff <dan.eloff at gmail.com> wrote:
> Michael Foord Wrote:
>> In my IronPython Web IDE I divert standard out and redirect it to an html
>> textarea so that I can see everything that is printed. This is very useful
>> for debugging.
>> If you are doing this from threads you ought to use a dispatcher to add the
>> text to the htmlarea - but it is very easy.
> I redirect stdout and stderr to an interactive python console in
> silverlight, but it does me no good here because this is happening
> before the console loads. So I think I will need to create an html
> textarea like you suggested to handle any output before the console
> loads.
> -Dan

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