How Can I Run Python Scripts from C# and Capture Their Output?

Running Python Scripts from C#: A Comprehensive Guide

In the realm of inter-language cooperation, the question of executing Python scripts from C# often arises. Despite attempts to provide concise answers, the details can sometimes remain elusive. Let's delve into the specifics and clarify this process.

The primary challenge lies in building the command line arguments for Python execution. To begin, you must provide the full path to the Python executable as the FileName in ProcessStartInfo. Next, assemble the Arguments string by incorporating both the script path and the file to be processed.

To capture output from the Python script, set UseShellExecute to false. This also enables the usage of RedirectStandardOutput.

Adjusted Code:

private void run_cmd(string cmd, string args)
{
    ProcessStartInfo start = new ProcessStartInfo();
    start.FileName = "my/full/path/to/python.exe";
    start.Arguments = string.Format("{0} {1}", cmd, args);
    start.UseShellExecute = false;
    start.RedirectStandardOutput = true;
    using (Process process = Process.Start(start))
    {
        using (StreamReader reader = process.StandardOutput)
        {
            string result = reader.ReadToEnd();
            Console.Write(result);
        }
    }
}

In this code, the FileName property points to the actual Python executable. The Arguments string concatenates the script path and the file to be read by the Python code.

Further Clarifications:

• Instead of hardcoding the Python executable path, consider using a globally installed Python interpreter.
• The format of the Arguments string may vary depending on the specific Python script you are running. Consult Python documentation for details.
• This approach eliminates the need for IronPython or other external tools. It allows for direct communication between C# and Python, capturing output and enabling continuous interaction.

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