super().__init__() throws TypeError: No method matches given arguments for Object..ctor: ()

[welbouri]

Environment

• Pythonnet version: 3.0.3
• Python version: 3.10.10
• Operating System: Windows 10
• .NET Runtime: net6.0

Details

• Create a python class that inherits from a C# class
• Instantiate a python object from that python class

Please find attached a minimal project that shows the sporadic exception.

pythonnet.issue.zip

• PythonnetIssue : C# minimal project
• superInit : python project to rerpoduce the issue

Exception

TypeError: Invoked a non-static method with an invalid instance

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:\workspace\pythonnet.issue\superInit\main.py", line 15, in <module>
    a = PythonClass('name')
  File "D:\workspace\pythonnet.issue\superInit\main.py", line 9, in __init__
    super().__init__()
TypeError: No method matches given arguments for ParentClass..ctor: ()

[lostmsu]

Can you inline the ParentClass here?

[welbouri]

namespace PythonnetIssue
{
    public class ParentClass
    {
        public ParentClass()
        {

        }
    }
}

[welbouri]

Hint : From what I have found in some other cases, I am doubting that the sporadic exception thrown by super().__init__() occurs when we set __namespace__

[goncalogiga]

Hello,

I am also facing this issue when inheriting a python class from AstVisitor:

TypeError: Invoked a non-static method with an invalid instance

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/usr/lib/python3.10/multiprocessing/pool.py", line 51, in starmapstar
    return list(itertools.starmap(args[0], args[1]))
  File "/home/user/pythonnet_project/feature_extraction/feature_extraction.py", line 49, in compute_powershell_features
    **get_structural_features(ast),
  File "/home/user/pythonnet_project/feature_extraction/structural.py", line 147, in get_structural_features
    return ast.GetFeatures(AST_NODES_TYPES) if ast else {}
  File "/home/user/pythonnet_project/feature_extraction_utils/pspython.py", line 180, in GetFeatures
    visitor = PyAstVisitor(ast_node_types)
  File "/home/user/pythonnet_project/feature_extraction_utils/pspython.py", line 77, in __init__
    super().__init__(*args, **kwargs)
TypeError: No method matches given arguments for AstVisitor..ctor: ()

Like welbouri said, the exception is raised randomly after around 30000+ instantiations of the python class. In our case, skipping __namespace__ is not possible, since AstVisitor is an abstract class. Any updates on this issue ?