How to run .py files and call function by using python.Net library. i have tried below code but it is not running.

    using (Py.GIL()){
      var fromFile = PythonEngine.Compile(null, @"C:\PycharmProjects\pythonenet\main.py", RunFlagType.File);
      fromFile.InvokeMethod("replace");//
    }

main.py file:

import re
def replace():
 print(re.sub(r"\s","*","Python is a programming langauge"))

When i try to run from string it is working.

       using (Py.GIL()){
          string co = @"def someMethod():
                print('This is from static script')";
          var fromString = PythonEngine.ModuleFromString("someName", co);
          fromString.InvokeMethod("someMethod");   
        }

CodePudding user response：

The purpose of Python.NET (pythonnet) is to enable fast scripting for .NET developers. Python.NET is used to script .NET components (like C#, VB.NET, F3). If your goal is to make one Python program run another Python program, you can use the features provided by Python:

# service.py
import main

def something():
    print('service: something()')

if __name__ == '__main__':
   something()
   main.something()

# main.py
import subprocess

def something():
    print('main: something()')

if __name__ == '__main__':
    something()
    subprocess.call("service.py", shell=True)

The output in the first group below is produced by running the main.py program, and the output in the second group is produced by running the service.py program.

# Running the "main.py" file produces the following output:
main: something()
service: something()
main: something()

# Running the "service.py" file produces the following output:
service: something()
main: something()

Note that two different solutions are used above:

1. Added import main command line to include main.py file in service.py file.
2. The subprocess module was used to run the service.py file from the main.py file.

CodePudding user response：

Finally i ended up with the following solution.

              using (Py.GIL()){
                    string file_path = @"C:\PycharmProjects\pythonnet\main.py";
                    string final_path = null;
                    string module_name = null;
                    if (file_path.EndsWith(".py"))
                    {
                        int delim = file_path.LastIndexOf(@"\");
                        final_path = file_path.Substring(0,delim > 0 ? delim : 0); //C:\PycharmProjects\pythonnet
                        int module_length = (file_path.Length - delim) - 4;
                        if (module_length > 0)
                            module_name = file_path.Substring(delim 1, module_length);//main
                    }
                    if (final_path != null && module_name != null)
                    {
                        dynamic ps = Py.Import("sys");
                        ps.path.append(final_path);
                        var obj = Py.Import(module_name);
                        Console.WriteLine(obj.InvokeMethod("replace"));
                    }else
                       throw new Exception("Invalid filename or file path");
          }