IronPython create generic class

Question

It is possible to create a generic class in IronPython? I want to inherit from a generic c# class and implement a custom IronPython class on top.

for example:

public class A<T>
{

}

First IronPython class:

class B[T](A[T]): # Problematic part. I don't know how to create a
                  # generic ironpython class

Second IronPython class:

class C(B[object]):

So in the first IronPython is the problem. I don't now hot to create a generic class to pass the type. Is this possible?

EDIT

I don't just want to use generic c# classes. I want to implement my own in IronPython and inherting from a c# class.

EDIT2

What I want to achive is a class A that has a python base class B, which should have a generic C# baseclass C. The python baseclass B is independent of the type of the C# baseclass C (it's just a specialization of the generic C# class), but it has to initialize the correct C# base class.

Thank you!

Possible duplicate of Initialize C# List<T> from IronPython? — Frank V
– Frank V, Commented Oct 19, 2015 at 13:39
@FrankV it' s complet different. I want to create my OWN generic class in IronPython, not just use tham. — BendEg
– BendEg, Commented Oct 19, 2015 at 13:42

Jeff Mercado · Accepted Answer · 2015-10-20 21:42:28Z

2

(Iron)Python is a dynamically typed language, there is no such notion of generic classes in python. You can derive from a generic .NET class, but you can't actually create a generic python class, there is no such thing.

You can however mimic the syntax with the use of some decorators.

class B(object):
    class _Meta(type):
        def __getitem__(cls, t):
            from System.Collections.Generic import List as A # just an example
            class _B(A[t]):
                pass
            return _B
    __metaclass__ = _Meta

class C(B[object]):
    pass

Your actual implementation of B is the class _B in the example.

answered Oct 20, 2015 at 21:42

Jeff Mercado

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1 Comment

BendEg Over a year ago

Ok, works perfectly. But when i want to add some custom methods to B, why must the declared in _B. If i declare them in B, i get the message: _B as no attribute Add2? Placing Add2 in _B and every thing works. Thank you!

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