This function is similar to the function I proposed here #484. These two functions can be integrated into single one，“How to convert between python objects and CLR objects dynamically？”

Based on my code before, I just wrote a new PyConverter here. I can make a PR if this design is accepted.

It can be used in these ways,

Convert between Python list and Clr List<T> dynamically;
Convert between Python dict and Clr Dictionary<K, V> dynamically;
Convert between Python object and Clr object, looks like Serialize and Deserialize.
Convert any complex objects, such as nested dictionaries, lists and objects etc.
It's extensible. Users can define his own PyClrType.

For this issue from stackoverflow, we can use the PyConverter in this way,

First define a PyConverter according to needs,

public PyConverter NewMyDictConverter()
{
    using (Py.GIL())
    {
        var converter = new PyConverter(); 
        converter.AddListType();
        converter.Add(new StringType());
        converter.Add(new Int64Type());
        converter.Add(new Int32Type());
        converter.Add(new FloatType());
        converter.Add(new DoubleType());
        converter.AddDictType<string, object>();
        return converter;
    }
}

Then, we can use this converter to convert a Clr Dictionary into a Python Dictionary, and vice versa.


using (Py.GIL())
{  
    //create a instance of PyConverter                
    var converter = NewMyDictConverter();

    var scope = Py.CreateScope();
    scope.Exec(
         "a={'0': 1, '1': [1, \"2\"]}"
    );
    dynamic a = scope.Get("a");  // mock a python dictionary

    var b = converter.ToClr(a);   //Convert python dict to Clr Dictionary<string, object>

    var c = converter.ToPython(b);  // Convert Clr Dictionary to python dict
    object c0 = c["0"];
    object c1 = c["1"];

    var d = converter.ToClr(c);
    object d0 = d["0"];
    object d1 = d["1"];

    scope.Dispose();
}

c# <-> python dictionary converter #623

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