CODEWITHSUNDEEP
c#python.net
Barthilas
Barthilas

Reputation: 23

Run Python script with imports in C#

Lets say I have this super Python script that needs to run cv2 in the future...

import cv2

def method():
    print("Hello")
    parameter = "l"
    return "OOPS"

method()

And in C# something like this.

Process p = new Process();
    p.StartInfo = new ProcessStartInfo(@"D:\Programming\Python\python.exe", fileName)
    {
        RedirectStandardOutput = true,
        UseShellExecute = false,
        CreateNoWindow = true
    };
    p.Start();
    string output = p.StandardOutput.ReadToEnd();

But this does throw an error "ImportError: DLL load failed". Alright seems like it is lookin in wrong directories for libraries since I have about 4 Python interpreters. Follows quick fix.

string path = @"D:\Programming\Python;" + Environment.GetEnvironmentVariable("PATH", EnvironmentVariableTarget.Machine);
            Environment.SetEnvironmentVariable("PATH", path, EnvironmentVariableTarget.Process);
            Environment.SetEnvironmentVariable("PYTHONHOME", @"D:\Programming\Python;", EnvironmentVariableTarget.Process);
            Environment.SetEnvironmentVariable("PYTHONPATH ", @"D:\Programming\Python\Lib; D:\Programming\Python\DLLs", EnvironmentVariableTarget.Process);
            string fileName = @"..\Python\hello.py";

            Process p = new Process();
            p.StartInfo = new ProcessStartInfo(@"D:\Programming\Python\python.exe", fileName)
            {
                RedirectStandardOutput = true,
                UseShellExecute = false,
                CreateNoWindow = true
            };
            p.Start();
            string output = p.StandardOutput.ReadToEnd();

Import DLL is fixed now, but another wild bug appeared named,
Fatal Python error: initfsencoding: unable to load the file system codec
ModuleNotFoundError: No module named 'encodings'

At this point I am lost and dont know what should I do next... any ideas are welcome, have a nice day.

UPDATE: Deleted all other python interpretors aside from anaconda and one virtual env and tried following:

  1. Run Python script from Visual Studio Code with given interpretor, works fine.
  2. Run it from Anaconda prompt, aswell.
  3. Added manually to system environment variables
    PATH=D:\Programming\Python
    PYTHONHOME=D:\Programming\Python PYTHONPATH=D:\Programming\Python\Lib;D:\Programming\Python\DLLs;D:\Programming\Python\Lib\site-packages

So now I can successfully call "python" from cmd, like that and check version, the virtual env is python 3.6 and this is the right one. Python is correct
But this is where all the fun begins you would expect "hello" in your console... hell incarnate

Upvotes: 1

Views: 1920

Answers (1)

Barthilas
Barthilas

Reputation: 23

Did not find correct answer to this problem, but discovered workaround in p2exe or pyinstaller.
Simply call pyinstaller.py --onefile xx.py and create exe file and pass that into process.

Upvotes: 1

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