event.Control as foo in ironpython #611

Environment

• Pythonnet version: latest
• Python version: 3.6.4
• Operating System: WinOS

Details

I like to have an autocomplete textbox in datagridview with editingshowing event handler. in c# event argument in function event.Control can be morph to a textbox with that event. as e.Control as Textbox but in ironpython I received a invalid because I use as keyword in winform expression and not in import expression.
how can I achieve the same functionality of this?
TODO

• What commands did you run?

python dgv.py

-   If there was a crash, please include the traceback here.

file dgv.py line 70
autotext = e.Control as Textbox
SystaxError: unexpected token 'as'