PythonRegex.cs

public IList<string> PythonRegex(
    string needle,
    string haystack,
    bool enhanceMatch = false,
    bool bestMatch = false)
{
    var argNeedle = needle.Replace("'", @"\'");
    var argHaystack = haystack.Replace("'", @"\'");
    var pyCommand = (
        $"import regex;" +
        $"import json;" +
        $"t=regex.search('{argNeedle}','{argHaystack}'," +
        (enhanceMatch ? "regex.ENHANCEMATCH," : "") +
        (bestMatch ? "regex.BESTMATCH," : "") +
        $");" +
        $"print(t.group(0));" +
        $"print(json.dumps(t.groups()));"
        );
    ProcessStartInfo pyStart = new ProcessStartInfo
    {
        FileName = @"python",
        Arguments = $"-c \"{pyCommand}\"",
        UseShellExecute = false,
        RedirectStandardOutput = true,
        RedirectStandardError = true,
    };

    string[] groups = null;
    using (var pyProcess = Process.Start(pyStart))
    using (var reader = pyProcess.StandardOutput)
    using (var error = pyProcess.StandardError)
    {
        var err = error.ReadToEnd();
        if (!String.IsNullOrWhiteSpace(err))
        {
            throw new ArgumentException(err);
        }
        var first = reader.ReadLine();
        var others = reader.ReadLine();
        groups = new object[] { first }
            .Concat(JArray.Parse(others))
            .Select(t => t.ToString())
            .ToArray();
    }
    return groups;
}