IronPython in a C# application - SyntaxErrorException: 'invalid syntax'

Question

I am trying to execute some python using IronPython in a C# WPF application. The code below works without the 'import os' line is removed. With that line I get a SyntaxErrorException: 'invalid syntax' error. I believe that is the correct syntax?

    public MainWindow()
    {
        InitializeComponent();

        ScriptEngine pythonEngine = Python.CreateEngine();
        var paths = pythonEngine.GetSearchPaths();
        paths.Add(@"C:\Python38\Lib");
        pythonEngine.SetSearchPaths(paths);

        ScriptScope scope = pythonEngine.CreateScope();
        scope.SetVariable("App", this);

        ScriptSource pythonScript = pythonEngine.CreateScriptSourceFromString(@"
import os
f = open('demofile4.txt', 'a') 
f.write('Now the file has more content!')
f.close()");
        pythonScript.Execute(scope);
    }

[IronPython cannot import module “os”](https://stackoverflow.com/questions/17999355/ironpython-cannot-import-module-os) — stuartd, Aug 07 '21 at 23:30
Thanks @stuartd. They didn't seem to make the same mistake as me — Kristian Fitzgerald, Aug 08 '21 at 11:40

score 1 · Accepted Answer · answered Aug 08 '21 at 11:36

I have this working now. IronPython isn't compatible with Python 3.8. From the website:

IronPython 3.4 uses Python 3.4 syntax and standard libraries

I downloaded Python 3.4.10 and, in my code, changed:

paths.Add(@"C:\Python38\Lib");

To:

paths.Add(@"C:\Python-3.4.10\Lib");

IronPython in a C# application - SyntaxErrorException: 'invalid syntax'

1 Answers1