Python for .NET is a package that gives Python programmers nearly seamless integration with the .NET Common Language Runtime (CLR) and provides a powerful application scripting tool for .NET developers. It allows Python code to interact with the CLR, and may also be used to embed Python into a .NET application.

Python for .NET allows CLR namespaces to be treated essentially as Python packages.

importclrfromSystemimportStringfromSystem.Collectionsimport*

To load an assembly, use the AddReference function in the clr module:

importclrclr.AddReference("System.Windows.Forms") fromSystem.Windows.FormsimportForm

• All calls to python should be inside a using (Py.GIL()){/* Your code here */} block.
• Import python modules using dynamic mod = Py.Import("mod"), then you can call functions as normal, eg mod.func(args).
• Use mod.func(args, Py.kw("keywordargname", keywordargvalue)) to apply keyword arguments.
• All python objects should be declared as dynamic type.
• Mathematical operations involving python and literal/managed types must have the python object first, eg. np.pi * 2 works, 2 * np.pi doesn't.

staticvoidMain(string[]args){using(Py.GIL()){dynamicnp=Py.Import("numpy");Console.WriteLine(np.cos(np.pi*2));dynamicsin=np.sin;Console.WriteLine(sin(5));doublec=np.cos(5)+sin(5);Console.WriteLine(c);/* this block is temporarily disabled due to regression #249 dynamic a = np.array(new List<float>{1, 2, 3 }); Console.WriteLine(a.dtype); dynamic b = np.array(new List<float>{6, 5, 4 }, Py.kw("dtype", np.int32)); Console.WriteLine(b.dtype); Console.WriteLine(a * b); */Console.ReadKey();}}

Output:

1.0-0.958924274663-0.6752620892float64int32 [ 6.10.12.]