/**
* C# Script
**/

public void QGISChecker()
        {
            ScriptEngine pythonEngine = Python.CreateEngine();
            var scope = pythonEngine.CreateScope();
            var libs = new[] {
                dataPath + "IronPythonLib\\Python36\\Lib",
                dataPath + "qgis\\python",
            };

            pythonEngine.SetSearchPaths(libs);
            pythonEngine.ExecuteFile(dataPath + "Py_LivrableChecker\\__main__.py", scope);
}

____________________________________________________________________________________________________________________________________

/**
* Python Script
**/

from qgis.core import *
sss
def main():
	# supply path to qgis install location
	QgsApplication.setPrefixPath("C:\Program Files\QGIS 3.0", True)

	# create a reference to the QgsApplication, setting the
	# second argument to False disables the GUI
	qgs = QgsApplication([], False)

	# load providers
	qgs.initQgis()

	print('FINALLY')

	# Write your code here to load some layers, use processing algorithms, etc.
	# When your script is complete, call exitQgis() to remove the provider and
	# layer registries from memory
	qgs.exitQgis()

if __name__ == "__main__":
	print("Test.py is currently working...")
	main()