QuantConnect.pythonnet 2.0.52

Prefix Reserved
.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package QuantConnect.pythonnet --version 2.0.52
                    


                    

                
NuGet\Install-Package QuantConnect.pythonnet -Version 2.0.52
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="QuantConnect.pythonnet" Version="2.0.52" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="QuantConnect.pythonnet" Version="2.0.52" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="QuantConnect.pythonnet" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add QuantConnect.pythonnet --version 2.0.52
                    


                    

                
#r "nuget: QuantConnect.pythonnet, 2.0.52"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package QuantConnect.pythonnet@2.0.52
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=QuantConnect.pythonnet&version=2.0.52
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=QuantConnect.pythonnet&version=2.0.52
                    


                            Install as a Cake Tool

pythonnet is a package that gives .NET programmers ability to integrate Python engine and use Python libraries.

Embedding Python in .NET

  • You must set Runtime.PythonDLL property or PYTHONNET_PYDLL environment variable, otherwise you will receive BadPythonDllException (internal, derived from MissingMethodException) upon calling Initialize. Typical values are python38.dll (Windows), libpython3.8.dylib (Mac), libpython3.8.so (most other *nix). Full path may be required.
  • 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). You can also access Python objects via PyObject and dervied types instead of using dynamic.
  • Use mod.func(args, Py.kw("keywordargname", keywordargvalue)) or mod.func(args, keywordargname: keywordargvalue) to apply keyword arguments.
  • Mathematical operations involving python and literal/managed types must have the python object first, eg. np.pi * 2 works, 2 * np.pi doesn't.

Example

using var _ = Py.GIL();

dynamic np = Py.Import("numpy");
Console.WriteLine(np.cos(np.pi * 2));

dynamic sin = np.sin;
Console.WriteLine(sin(5));

double c = (double)(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.]

Resources

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

.NET Foundation

This project is supported by the .NET Foundation.

Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (26)

Showing the top 5 NuGet packages that depend on QuantConnect.pythonnet:

Package Downloads
QuantConnect.Common

QuantConnect LEAN Engine: Common Project - A collection of common definitions and utils
QuantConnect.Indicators

QuantConnect LEAN Engine: Indicators Project - A collection of financial indicators
QuantConnect.Algorithm

QuantConnect LEAN Engine: Algorithm Project - Core QCAlgorithm implementation
QuantConnect.Algorithm.Framework

QuantConnect LEAN Engine: Algorithm.Framework Project - The core QCAlgorithm framework implementation
QuantConnect.Lean.Engine

QuantConnect LEAN Engine: Engine Project - Core engine and datafeed implementation

GitHub repositories (2)

Showing the top 2 popular GitHub repositories that depend on QuantConnect.pythonnet:

Repository Stars
QuantConnect/Lean
Lean Algorithmic Trading Engine by QuantConnect (Python, C#)
Capnode/Algoloop
Windows desktop algo trading with QuantConnect Lean engine.
Version Downloads Last Updated
2.0.52 14,017 12/29/2025
2.0.51 1,181 12/26/2025
2.0.50 23,621 10/31/2025
2.0.49 3,934 10/21/2025
2.0.48 19,298 8/15/2025
2.0.47 535 8/14/2025
2.0.46 3,316 8/6/2025
2.0.45 746 7/31/2025
2.0.44 19,670 5/2/2025
2.0.43 263 5/1/2025
2.0.42 43,235 12/20/2024
2.0.41 6,532 12/3/2024
2.0.40 2,040 11/1/2024
2.0.39 11,609 9/27/2024
2.0.38 52,241 5/24/2024
2.0.37 4,154 5/14/2024
2.0.36 6,008 4/23/2024
2.0.35 6,441 4/19/2024
2.0.34 18,645 4/17/2024
2.0.33 288 4/16/2024
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