Environment
Pythonnet version: 2.5.1
Python version: Python 3.9.2
Operating System: MacOS
.NET Runtime: 5.0.200
Details
Related to the problem reported in #1414
I.e. classes-in-classes are not handled properly in Pythonnet.
Even when applying the workaround mentioned in the #1414 issue there are still problems related to the inheritance.
Namely, I can not call a method declared on the baseclass, on an instance of the nested child class.
The following code demonstrates the issue
namespace pythonnet_testing {
public class Bar {
public string MethodInBaseClass() {
return "hello";
}
public class Hej : Bar {
}
}
public class Foo {
public Bar Bar;
public static Foo Create() {
Foo f = new();
f.Bar = new Bar.Hej();
return f;
}
}
class Program {
static void Main(string[] args) {
var pyCode = @"
import pythonnet_testing
f = pythonnet_testing.Foo.Create()
print('Trying to access member of nested subclass')
_ = pythonnet_testing.Bar # NOTE: The python code crashes unless this explicit reference to the Bar class is used
print(f'Bar: {f.Bar}')
print(f'Method call: {f.Bar.MethodInBaseClass()}')
";
PythonEngine.Initialize();
using (Py.GIL()) {
PythonEngine.Exec(pyCode);
}
}
}Running this gives the following error message
Trying to access member of nested subclass
Bar: pythonnet_testing.Bar+Hej
Unhandled exception. Python.Runtime.PythonException: AttributeError : 'Hej' object has no attribute 'MethodInBaseClass'
[' File "<string>", line 7, in <module>\n'] at Python.Runtime.PythonException.ThrowIfIsNull(BorrowedReference reference)
at Python.Runtime.PythonEngine.RunString(String code, Nullable`1 globals, Nullable`1 locals, RunFlagType flag)
In order to call the MethodInBaseClass method on the child class, I must explicitly re-define it like this:
public class Hej : Bar {
public new string MethodInBaseClass() => base.MethodInBaseClass();
}
Environment
Pythonnet version: 2.5.1
Python version: Python 3.9.2
Operating System: MacOS
.NET Runtime: 5.0.200
Details
Related to the problem reported in #1414
I.e. classes-in-classes are not handled properly in Pythonnet.
Even when applying the workaround mentioned in the #1414 issue there are still problems related to the inheritance.
Namely, I can not call a method declared on the baseclass, on an instance of the nested child class.
The following code demonstrates the issue
Running this gives the following error message
In order to call the
MethodInBaseClassmethod on the child class, I must explicitly re-define it like this: