QuantConnect.pythonnet 2.0.43

Prefix Reserved
.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package QuantConnect.pythonnet --version 2.0.43
                    


                    

                
NuGet\Install-Package QuantConnect.pythonnet -Version 2.0.43
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="2.0.43" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="QuantConnect.pythonnet" Version="2.0.43" />
                    


                            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 2.0.43
                    


                    

                
#r "nuget: QuantConnect.pythonnet, 2.0.43"
#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@2.0.43
#: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=2.0.43
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=QuantConnect.pythonnet&version=2.0.43
                    


                            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 net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  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
2.0.45 110 7/31/2025
2.0.44 12,662 5/2/2025
2.0.43 165 5/1/2025
2.0.42 31,116 12/20/2024
2.0.41 4,453 12/3/2024
2.0.40 1,893 11/1/2024
2.0.39 9,193 9/27/2024
2.0.38 37,946 5/24/2024
2.0.37 3,348 5/14/2024
2.0.36 5,209 4/23/2024
2.0.35 4,944 4/19/2024
2.0.34 18,022 4/17/2024
2.0.33 203 4/16/2024
2.0.32 1,529 4/15/2024
2.0.31 497 4/12/2024
2.0.30 230 4/11/2024
2.0.29 4,898 3/18/2024
2.0.28 7,276 3/5/2024
2.0.27 192 3/4/2024
2.0.26 39,912 12/8/2023
2.0.25 5,756 11/21/2023
2.0.24 8,061 10/27/2023
2.0.23 2,352 10/19/2023
2.0.22 780 10/12/2023
2.0.21 50,879 7/11/2023
2.0.20 5,480 6/26/2023
2.0.19 245 6/26/2023
2.0.18 86,544 3/3/2023
2.0.17 123,530 8/24/2022
2.0.16 21,309 6/27/2022
2.0.15 25,378 5/17/2022
2.0.14 5,307 5/6/2022
2.0.13 4,727 5/2/2022
2.0.12 5,898 4/28/2022
2.0.11 78,557 12/27/2021
2.0.10 30,883 10/22/2021
2.0.9 505 10/21/2021
2.0.8 5,296 10/13/2021
2.0.7 770 10/8/2021
2.0.6 16,190 8/26/2021
2.0.5 20,331 7/14/2021
2.0.4 33,677 6/11/2021
2.0.3 3,169 6/8/2021
2.0.2 8,407 5/28/2021
2.0.1 21,382 3/13/2021
2.0.0 1,056 3/9/2021
1.0.5.30 222,568 3/31/2020
1.0.5.29 44,442 11/13/2019
1.0.5.28 724 11/12/2019
1.0.5.27 678 11/12/2019
1.0.5.26 8,989 10/15/2019
1.0.5.25 5,605 9/23/2019
1.0.5.24 6,038 9/10/2019
1.0.5.23 812 9/5/2019
1.0.5.22 723 9/5/2019
1.0.5.21 921 6/24/2019
1.0.5.20 41,381 4/23/2019
1.0.5.19 5,126 4/2/2019
1.0.5.18 941 3/27/2019
1.0.5.17 12,265 2/21/2019
1.0.5.16 807 2/20/2019
1.0.5.15 9,273 1/22/2019
1.0.5.14 947 1/18/2019
1.0.5.13 927 1/15/2019
1.0.5.12 10,669 8/27/2018
1.0.5.11 985 8/27/2018
1.0.5.10 1,010 8/24/2018
1.0.5.9 1,266 7/23/2018
1.0.5.8 39,035 7/16/2018
1.0.5.7 288,156 4/2/2018
1.0.5.6 1,383 4/2/2018
1.0.5.5 2,993 2/2/2018
1.0.5.4 2,684 12/29/2017
1.0.5.3 1,378 12/29/2017
1.0.5.2 1,665 11/29/2017
1.0.5.1 3,233 10/9/2017
1.0.5 1,398 9/29/2017
1.0.4.8 1,552 9/12/2017
1.0.4.7 1,175 9/8/2017
1.0.4.6 1,182 9/4/2017
1.0.4.5 1,195 8/21/2017
1.0.4.4 2,797 6/23/2017
1.0.4.3 1,262 6/23/2017
1.0.4.2 1,208 6/22/2017
1.0.4.1 1,187 6/22/2017
1.0.4 1,300 6/15/2017
1.0.3.5 1,664 6/1/2017
1.0.3.4 1,198 6/1/2017
1.0.3.3 1,196 6/1/2017
1.0.3.2 1,189 5/31/2017
1.0.3.1 1,227 5/31/2017
1.0.3 1,209 5/31/2017
1.0.2.1 1,336 5/25/2017
1.0.2 1,254 5/23/2017
1.0.1.1 2,140 4/11/2017
1.0.0 1,291 1/12/2017