使用pythonnet從python調用C＃代碼

Question

以下是C＃代碼。我如何使用pythonnet從Python中的NonGenericClass內部調用GenericMethod（）？

namespace CSharpTestCode 
{ 
    public interface Person 
    { 
    } 

    public class Employee : Person 
    { 
    } 

    public class TempGenericClass<T> 
    { 
    } 

    public class NonGenericClass 
    { 
     public static T GenericMethod<T>(TempGenericClass<T> tempGeneric) where T : class, Person 
     { 
      return null; 
     } 
    } 
} 

Python代碼，我嘗試：

import clr 
clr.AddReference(r'\Documents\visual studio 2015\Projects\SamplePythonApp\CSharpTestCode\bin\Debug\CSharpTestCode.dll') 
from CSharpTestCode import * 

genericMethod = NonGenericClass.GenericMethod(TempGenericClass[Employee]()) 

錯誤，我得到：

Unhandled Exception: System.ArgumentException: GenericArguments[0], 'CSharpTestCode.TempGenericClass`1[CSharpTestCode.Employee]', on 'T GenericMethod[T](CSharpTestCode.TempGenericClass`1[T])' violates the constraint of type 'T'. ---> System.Security.VerificationException: Method CSharpTestCode.NonGenericClass.GenericMethod: type argument 'CSharpTestCode.TempGenericClass`1[CSharpTestCode.Employee]' violates the constraint of type parameter 'T'. 
    at System.RuntimeMethodHandle.GetStubIfNeeded(RuntimeMethodHandleInternal method, RuntimeType declaringType, RuntimeType[] methodInstantiation) 
    at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation) 
    --- End of inner exception stack trace --- 
    at System.RuntimeType.ValidateGenericArguments(MemberInfo definition, RuntimeType[] genericArguments, Exception e) 
    at System.Reflection.RuntimeMethodInfo.MakeGenericMethod(Type[] methodInstantiation) 
    at Python.Runtime.MethodBinder.MatchParameters(MethodInfo[] mi, Type[] tp) 
    at Python.Runtime.MethodBinder.Bind(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo) 
    at Python.Runtime.MethodBinder.Invoke(IntPtr inst, IntPtr args, IntPtr kw, MethodBase info, MethodInfo[] methodinfo) 
    at Python.Runtime.MethodObject.Invoke(IntPtr target, IntPtr args, IntPtr kw, MethodBase info) 
    at Python.Runtime.MethodBinding.tp_call(IntPtr ob, IntPtr args, IntPtr kw) 

Answer 1

我應該承認pythonnet不應該對這個壞榜樣甚至崩潰的CPython解釋泛型調用具有無效參數的方法。

下面是如何正確地pythonnet讓你的普通電話，注意如何傳遞錯誤的類型沒有適當地：

In [3]: NonGenericClass.GenericMethod[Person](TempGenericClass[Person]()) 


In [4]: NonGenericClass.GenericMethod[Employee](TempGenericClass[Employee]()) 


In [5]: NonGenericClass.GenericMethod[Person](TempGenericClass[Employee]()) 
--------------------------------------------------------------------------- 
TypeError         Traceback (most recent call last) 
<ipython-input-5-d13751f7586f> in <module>() 
----> 1 NonGenericClass.GenericMethod[Person](TempGenericClass[Employee]()) 

TypeError: No method matches given arguments 


In [6]: NonGenericClass.GenericMethod[Employee](TempGenericClass[Person]()) 
--------------------------------------------------------------------------- 
TypeError         Traceback (most recent call last) 
<ipython-input-6-04c3c0db6c6b> in <module>() 
----> 1 NonGenericClass.GenericMethod[Employee](TempGenericClass[Person]()) 

TypeError: No method matches given arguments