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

import clr from System import String from System.Collections import * 

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

import clr clr.AddReference("System.Windows.Forms") from System.Windows.Forms import Form 

• 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)) or mod.func(args, 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.

static void Main(string[] args){using (Py.GIL()){dynamic np = Py.Import("numpy"); Console.WriteLine(np.cos(np.pi * 2)); dynamic sin = np.sin; Console.WriteLine(sin(5)); double c = np.cos(5) + sin(5); Console.WriteLine(c); dynamic a = np.array(new List<float>{1, 2, 3 }); Console.WriteLine(a.dtype); dynamic b = np.array(new List<float>{6, 5, 4 }, dtype: np.int32); Console.WriteLine(b.dtype); Console.WriteLine(a * b); Console.ReadKey()} } 

Output:

1.0 -0.958924274663 -0.6752620892 float64 int32 [ 6. 10. 12.] 

Information on installation, FAQ, troubleshooting, debugging, and projects using pythonnet can be found in the Wiki:

https://github.com/pythonnet/pythonnet/wiki

Mailing list

https://mail.python.org/mailman/listinfo/pythondotnet

Chat

https://gitter.im/pythonnet/pythonnet

This project is supported by the .NET Foundation.