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Integrate Python and .NET

pythonnet

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.

Integrate Python and .NET

Integrate Python and .NET

Calling .NET code from Python

Python for .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

Embedding Python in .NET

  • 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

EG:

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

outputs:

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

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