T
tatamata
Hello.
How can I run some Python script within C# program?
Thanks,
Zlatko
How can I run some Python script within C# program?
Thanks,
Zlatko
tatamata said:Hello.
How can I run some Python script within C# program?
Gerard Flanagan said:---------------------------------------------------------------------------------
ProcessStartInfo startInfo;
Process process;
string directory;
string pyArgs;
string script;
startInfo = new ProcessStartInfo("python");
startInfo.WorkingDirectory = directory;
startInfo.Arguments = script + " " + pyArgs;
startInfo.UseShellExecute = false;
startInfo.CreateNoWindow = true;
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardError = true;
process = new Process();
process.StartInfo = startInfo;
process.Start();
string s;
while ((s = process.StandardOutput.ReadLine()) != null)
{
//do something with s
}
---------------------------------------------------------------------------------
HTH
Gerard
Gerard Flanagan said:grupi:[email protected]...
Hello. I tried to implement ypour suggestion, but an error apears:
"Exception System.ComponentModel.Win32Exception was thrown in debugee:
The specified executable is not a valid Win32 application.
namespace CS_script
{
class MainClass
{
public static void Main(string[] args)
{
System.Diagnostics.ProcessStartInfo psi =new
System.Diagnostics.ProcessStartInfo();
psi.FileName="my_script.py";
psi.WorkingDirectory=Environment.CurrentDirectory;
psi.RedirectStandardOutput = true;
psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
psi.UseShellExecute = false;
psi.CreateNoWindow = true;
System.Diagnostics.Process script;
script = System.Diagnostics.Process.Start(psi);
System.IO.StreamReader myOutput = script.StandardOutput;
script.WaitForExit(2000);
if (script.HasExited)
{
string output = myOutput.ReadToEnd();
//this.processResults.Text = output;
}
MessageBox.Show("finished!");
}
}
}
When running the program, I have the following error:
"Exception System.ComponentModel.Win32Exception was thrown in debugee:
The specified executable is not a valid Win32 application.
StartWithCreateProcess()
Start()
Start()
Main() - c:\Documents and Settings\Zlatko\My Documents\SharpDevelop
Projects\CS_script\CS_script\Main.cs:32,5 "
Gerard Flanagan said:Hello. I tried to implement ypour suggestion, but an error apears:
"Exception System.ComponentModel.Win32Exception was thrown in debugee:
The specified executable is not a valid Win32 application.
namespace CS_script
{
class MainClass
{
public static void Main(string[] args)
{
System.Diagnostics.ProcessStartInfo psi =new
System.Diagnostics.ProcessStartInfo();
psi.FileName="my_script.py";
psi.WorkingDirectory=Environment.CurrentDirectory;
psi.RedirectStandardOutput = true;
psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
psi.UseShellExecute = false;
psi.CreateNoWindow = true;
System.Diagnostics.Process script;
script = System.Diagnostics.Process.Start(psi);
System.IO.StreamReader myOutput = script.StandardOutput;
script.WaitForExit(2000);
if (script.HasExited)
{
string output = myOutput.ReadToEnd();
//this.processResults.Text = output;
}
MessageBox.Show("finished!");
}
}
}
When running the program, I have the following error:
"Exception System.ComponentModel.Win32Exception was thrown in debugee:
The specified executable is not a valid Win32 application.
StartWithCreateProcess()
Start()
Start()
Main() - c:\Documents and Settings\Zlatko\My Documents\SharpDevelop
Projects\CS_script\CS_script\Main.cs:32,5 "
I have no means of running C# programs at present and can't claim much
expertise in any case. A guess is that a "valid Win32 application"
means an '.exe' file, not a '.py' file.
You are assuming that a Process object is as smart as the command
interpreter ('cmd.exe') and will know to use 'python.exe' for a file
with a 'py' extension?
What happens if you use 'python.exe' (or 'cmd.exe') as your file and
the script name as argument as in the code I posted?
Gerard
(PS. This group prefers that one doesn't top-post)
Gerard Flanagan said:grupi:[email protected]...
tatamata wrote:
Hello.
How can I run some Python script within C# program?
---------------------------------------------------------------------------------
ProcessStartInfo startInfo;
Process process;
string directory;
string pyArgs;
string script;
startInfo = new ProcessStartInfo("python");
startInfo.WorkingDirectory = directory;
startInfo.Arguments = script + " " + pyArgs;
startInfo.UseShellExecute = false;
startInfo.CreateNoWindow = true;
startInfo.RedirectStandardOutput = true;
startInfo.RedirectStandardError = true;
process = new Process();
process.StartInfo = startInfo;
process.Start();
string s;
while ((s = process.StandardOutput.ReadLine()) != null)
{
//do something with s
}Hello. I tried to implement ypour suggestion, but an error apears:
"Exception System.ComponentModel.Win32Exception was thrown in debugee:
The specified executable is not a valid Win32 application.
namespace CS_script
{
class MainClass
{
public static void Main(string[] args)
{
System.Diagnostics.ProcessStartInfo psi =new
System.Diagnostics.ProcessStartInfo();
psi.FileName="my_script.py";
psi.WorkingDirectory=Environment.CurrentDirectory;
psi.RedirectStandardOutput = true;
psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
psi.UseShellExecute = false;
psi.CreateNoWindow = true;
System.Diagnostics.Process script;
script = System.Diagnostics.Process.Start(psi);
System.IO.StreamReader myOutput = script.StandardOutput;
script.WaitForExit(2000);
if (script.HasExited)
{
string output = myOutput.ReadToEnd();
//this.processResults.Text = output;
}
MessageBox.Show("finished!");
}
}
}
When running the program, I have the following error:
"Exception System.ComponentModel.Win32Exception was thrown in debugee:
The specified executable is not a valid Win32 application.
StartWithCreateProcess()
Start()
Start()
Main() - c:\Documents and Settings\Zlatko\My Documents\SharpDevelop
Projects\CS_script\CS_script\Main.cs:32,5 "
I have no means of running C# programs at present and can't claim much
expertise in any case. A guess is that a "valid Win32 application"
means an '.exe' file, not a '.py' file.
You are assuming that a Process object is as smart as the command
interpreter ('cmd.exe') and will know to use 'python.exe' for a file
with a 'py' extension?
What happens if you use 'python.exe' (or 'cmd.exe') as your file and
the script name as argument as in the code I posted?
Gerard
(PS. This group prefers that one doesn't top-post)
Hello. It seems that the following code works. And it seems that Process
object can automatically run script by using python.exe, but only if
standard output is not redirected...
class MainClass
{
public static void Main(string[] args)
{
MyProcess myProcess = new MyProcess();
myProcess.ExecuteScript();
MessageBox.Show("Continue?","Application",
MessageBoxButtons.OKCancel);
}
}
public class MyProcess
{
// These are the Win32 error code for file not found or access
denied.
const int ERROR_FILE_NOT_FOUND =2;
const int ERROR_ACCESS_DENIED = 5;
/// <summary>
/// Executes a python script.
/// </summary>
public void ExecuteScript()
{
Process myProcess = new Process();
try
{
// Get the path that stores the python script.
//string myDocumentsPath
=Environment.GetFolderPath(Environment.SpecialFolder.Personal);
//If the script is placed in the same folder as C#
executable, set the path to current directory:
string myDocumentsPath=Environment.CurrentDirectory;
//Set the fully qualified script name
myProcess.StartInfo.FileName = myDocumentsPath +
"\\my_script.py";
//Execute the script:
myProcess.Start();
// Wait for it to die...
myProcess.WaitForExit();
MessageBox.Show ("Python script is successfully executed!");
}
catch (Win32Exception e)
{
if(e.NativeErrorCode == ERROR_FILE_NOT_FOUND)
{
Console.WriteLine(e.Message + ". Check the path.");
}
else if (e.NativeErrorCode == ERROR_ACCESS_DENIED)
{
// Note that if your word processor might generate
exceptions
// such as this, which are handled first.
Console.WriteLine(e.Message +
". You do not have permission to print this file.");
}
}
}
}
Greetings,
Zlatko
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.