Dan Eloff wrote:
In the 2.1 branch of 43741, it seems there is trouble subclassing a
CLR class that has protected constructors.
# Silverlight Toolkit
import clr
clr.AddReferenceToFile('Microsoft.Windows.Controls.Theming.dll')
from Microsoft.Windows.Controls.Theming import Theme
class MyTheme(Theme):
def __init__(self):
raise ValueError
MyTheme()
TypeError: MyTheme() takes at least 2 arguments (1 given)
In fact you can try MyTheme(1,2,3) and get the same error. You can
also not define an __init__ on MyTheme and get the same error.
This would lead me to suspect it's trying the whole time to call the
protected 2 argument constructor, and is ignoring the Python __init__
method. This is a blocker as I've not found any way around it that
will work in silverlight.
Hello Dan,
I can't find this assembly to experiment - but when you subclass a .NET
type in IronPython you override the constructor by overriding '__new__'
and not '__init__'. Perhaps this is the cause of your problem? (If the
default constructor takes two arguments then merely supplying an
__init__ method that only takes one won't stop the default two argument
constructor being called.)
Michael
By the way, should I should I be using the 2.0 branch rather? I expect
2.1 will be released long before I make my first release, so I thought
that's probably the way to go.
Thanks,
-Dan
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