Calling pyhton script from C# code

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i have called python file through c# code in windows console application

C#

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
           
            ProcessStartInfo start = new ProcessStartInfo();
            start.FileName = @"C:\Program Files(x86)\Microsoft Visual Studio\Shared\Python36_64\python.exe";//python path
          
            start.Arguments = @"E:\flowchart_testing\re_exercise.py";
            start.UseShellExecute = false;
            start.CreateNoWindow = true;
            start.RedirectStandardOutput = true;
            string result = "";
            using (Process process = Process.Start(start))
            {
                result = process.StandardOutput.ReadToEnd();
            }
            Console.WriteLine(result);
            Console.ReadKey();
            
        }
    }
}

the python file re_exercise.py contains

Python

print("hello")

the problem is throwing exception could not find the specified file at the start of the process

What I have tried:

i have tried adding python installer to path environment but couldnot resolve it

Posted 7-Dec-21 2:25am

Member 15021328

Updated 7-Dec-21 2:35am

Chris Copeland

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Chris Copeland · Answer 1 · 2021-12-07T02:35:00

If you're getting an error about the process not being able to find the specified file, it means that the path to the executable you're launching isn't correct. Have you tried taking the path in:

C#

@"C:\Program Files(x86)\Microsoft Visual Studio\Shared\Python36_64\python.exe";

And pasting it into a command prompt to see what happens? I'm going to wager that if you do you'll get the same error message about the file not existing, and I'm also going wager it's because you might have a mistake in the path:

C#

@"C:\Program Files(x86)\
                  ^

Should there be a space between Program Files and (x86)?

Member 1131834 · Answer 2 · 2024-04-04T07:47:00

Hi, I know this is old but maybe it will help someone. I used the following code and it worked as expected.

internal class Program
{
    static void Main(string[] args)
    {
        ProcessStartInfo start = new ProcessStartInfo();
        start.FileName = @"C:\Python27\python.exe";//python path

        start.Arguments = @"C:\Users\james\OneDrive\Desktop\ver1.py";
        start.UseShellExecute = false;
        start.CreateNoWindow = true;
        start.RedirectStandardOutput = true;
        string result = "";
        using (Process process = Process.Start(start))
        {
            result = process.StandardOutput.ReadToEnd();
        }
        Console.WriteLine(result);
        Console.ReadKey();
    }
}

For the script I kept it really simple:

import sys

print(sys.version)

Saved as ver1.py to my desktop as you can see.

Result -- I got this in the console window:

2.7.16 (v2.7.16:413a49145e, Mar  4 2019, 01:37:19) [MSC v.1500 64 bit (AMD64)]

Good luck, never quit just keep coding!

JR

Calling pyhton script from C# code

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