Create a generic List from C# dll in python script

Question

var settings = new SettingsClass();
settings.SpecificValue = new List<SpecificValueClass>();

This is the code example in my C# project.

I have a python script which imports the .dll with this code example and I want to create this settings.SpecificValue variable within the python script.

Is it somehow possible without making a function in C# which I can call within python code.

public class SettingsClass
{
    public bool Timesync { get; set; }
    public string SystemName { get; set; }
    public string Timezone { get; set; }
    public List<SpecificValueClass> SpecificValue{ get; set; }
}

public class SpecificValueClass
{
    public string ID { get; set; }
    public int value { get; set; }
}

In python I want to call it like this:

settings = SettingsClass() <-- this call is no problem and I can do it with a dotNet library in python
settings.SystemName = systemname
settings.Timesync = timesync
settings.Timezone = "%s//%s" % (timezone1,timezone2)
settings.SpecificValue = ... <-- not sure how to make this to create a empty List / empty whatever so I can add 2 objects of the type SpecificValueClass

(creating the 2 objects ob SpecificValueClass is also possible) So the only part that I can not get to work is the initialization of the settings.SpecificValue as it is a generic List ...

Any help would be appreciated

Yes it's possible. But you'd have to explain how is your .dll loaded in Python. [SO]: How to create a Minimal, Complete, and Verifiable example (mcve). Also what Python (version and distribution) are you using? — CristiFati
– CristiFati, Commented May 16, 2019 at 15:47
I am using an external tool - TestComplete - which makes the loading process via CLR Bridge - not sure if this information helps? Python 3.0 — Dominik Lemberger
– Dominik Lemberger, Commented May 16, 2019 at 16:52

Dominik Lemberger · Accepted Answer · 2019-05-21 13:22:45Z

6

Finally got it to work using the dotNet library from TestComplete but I guess it would be the same with the clr package from python. Just had to program the generics part myself which usually C# does with the tags:

typeListOf = dotNET.System.Type.GetType("System.Collections.Generic.List`1")
objType = dotNET.namespace.SpecificValueClass.zctor().GetType()
paramTypes = dotNET.System.Array.CreateInstance(dotNET.System.Type.GetType("System.Type"), 1)
paramTypes.SetValue(objType, 0)
typeListOfString = typeListOf.MakeGenericType(paramTypes)

newValue = dotNET.namespace.WattPeakValues.zctor()

newValue.ID = 1
settings.SpecificValue.Add(newValue)

answered May 21, 2019 at 13:22

Dominik Lemberger

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