So I have installed IronPython 3.4 to replace the IronPython 2.7 I was using. The code below worked fine in 2.7 but when I use it in 3.4 I am getting the error: Microsoft.Scripting.SyntaxErrorException: 'invalid syntax' Any ideas? Thanks.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
            Microsoft.Scripting.Hosting.ScriptEngine pythonEngine = IronPython.Hosting.Python.CreateEngine();
            Microsoft.Scripting.Hosting.ScriptSource pythonScript = pythonEngine.CreateScriptSourceFromString("print 'Hello World!'");
            pythonScript.Execute();

        }
    }
}

Tried the code above and it didn't work but worked in IronPython 2.7.

CodePudding user response：

IronPython 3.4 uses python 3.4 syntax where as IronPython 2.7 uses python 2.7.

In python 2.7 print is a statement, where as in python 3 print is a function(which means you need to use parentheses to wrap the arguments). So to make your code work you have to change the following section from

pythonEngine.CreateScriptSourceFromString("print 'Hello World!'");
                                           ^^^^^^^^^^^^^^^^^^^^

to

pythonEngine.CreateScriptSourceFromString("print('Hello World!')");
                                           ^^^^^^^^^^^^^^^^^^^^^