I am trying to call python using C# with the IronPython nuget

Question

I am very new to this and require some help. I am trying to call something basic as per the section below using C# with the IronPython nuget.

Below is what I am trying:

 Microsoft.Scripting.Hosting.ScriptEngine py = Python.CreateEngine(); 
 Microsoft.Scripting.Hosting.ScriptScope s = py.CreateScope(); 



py.Execute("import numpy as np incomes = np.random.normal(27000, 15000, 10000) x = np.mean(incomes)", s);

I keep receiving the following error: An exception of type 'Microsoft.Scripting.SyntaxErrorException' occurred in Microsoft.Scripting.dll but was not handled in user code

Any help would be appreciated thank you

you can use pyinstaller instead

FindOutIslamNow
– FindOutIslamNow

2019-02-20 11:29:48 +00:00
Commented Feb 20, 2019 at 11:29 — FindOutIslamNow
– FindOutIslamNow, Commented Feb 20, 2019 at 11:29

Erik Kinding · Accepted Answer · 2019-02-20 11:53:28Z

2

Be aware of indentation when working with Python. This works:

using IronPython.Hosting;
namespace PythonFromCSharp
{
    class Program
    {
        static void Main(string[] args)
        {
            Microsoft.Scripting.Hosting.ScriptEngine py = Python.CreateEngine();
            Microsoft.Scripting.Hosting.ScriptScope s = py.CreateScope();

            // add paths to where your libs are installed
            var libs = new[] { @"c:\path\to\lib1", @"c:\path\to\lib2" };
            py.SetSearchPaths(libs);

            py.Execute(
@"import numpy as np 
incomes = np.random.normal(27000, 15000, 10000) 
x = np.mean(incomes)"
            , s);
        }
    }
}

edited Feb 20, 2019 at 11:53

answered Feb 20, 2019 at 11:41

Erik Kinding

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4 Comments

Jacob O'Brien Over a year ago

Thank you, this is great advise. I still get the following error after:An exception of type 'IronPython.Runtime.Exceptions.ImportException' occurred in Microsoft.Dynamic.dll but was not handled in user code

Erik Kinding Over a year ago

Try adding paths to where numpy is installed. I updated my answer with an example on how to do that :)

Jacob O'Brien Over a year ago

This has been so helpful thank you. I have installed and added per your suggestion. I have made sure everything is up to date and installed correctly, but I get this error. unexpected token 'append' is there an issue with the way I set it up?

Erik Kinding Over a year ago

@JacobO'Brien Not sure why that is a problem, but I'd suggest you develop your python script in an other environment to start with and make sure that the script works as intended. Then you let your C# program open the file containing the script, instead of having it as part of the C# code. Indentation and line breaks are very important when it comes to python so make sure to get it right. I'd say that's much easier if you keep your script in a separate file rather than stored in a C# string.

Markus Dresch · Accepted Answer · 2019-02-20 11:33:50Z

1

Your Python syntax is incorrect. Insert line breaks (\n)

py.Execute("import numpy as np\nincomes = np.random.normal(27000, 15000, 10000)\nx = np.mean(incomes)", s);

answered Feb 20, 2019 at 11:33

Markus Dresch

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2 Comments

Jacob O'Brien Over a year ago

You, sir, are a legend! I have done that, but now get the following :An exception of type 'IronPython.Runtime.Exceptions.ImportException' occurred in Microsoft.Dynamic.dll but was not handled in user code

Erik Kinding Over a year ago

You need to install numpy, try doing so using pip or a similar tool.

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