c# - 自动查找python可执行文件的路径

Question

我正在做一个使用 python 作为后台脚本和 C# 作为家伙的项目。
我的问题是我不知道如何让我的 GUI 自动搜索 pythonw.exe文件以运行我的python脚本。

目前我正在使用这条路径:

ProcessStartInfo pythonInfo = new ProcessStartInfo(@"C:\\Users\\Omri\\AppData\\Local\\Programs\\Python\\Python35-32\\pythonw.exe");

但我希望它自动检测 pythonw.exe 的路径(我需要提交项目，除非他们更改代码本身，否则它不会在其他计算机上运行)

任何建议都可能会有所帮助。

Answer 1

受@Shashi Bhushan 回答的启发，我制作了这个函数来可靠地获取 Python 路径；

        private static string GetPythonPath(string requiredVersion = "", string maxVersion = "") {
            string[] possiblePythonLocations = new string[3] {
                @"HKLM\SOFTWARE\Python\PythonCore\",
                @"HKCU\SOFTWARE\Python\PythonCore\",
                @"HKLM\SOFTWARE\Wow6432Node\Python\PythonCore\"
            };

            //Version number, install path
            Dictionary<string, string> pythonLocations = new Dictionary<string, string>();

            foreach (string possibleLocation in possiblePythonLocations) {
                string regKey = possibleLocation.Substring(0, 4), actualPath = possibleLocation.Substring(5);
                RegistryKey theKey = (regKey == "HKLM" ? Registry.LocalMachine : Registry.CurrentUser);
                RegistryKey theValue = theKey.OpenSubKey(actualPath);

                foreach (var v in theValue.GetSubKeyNames()) {
                    RegistryKey productKey = theValue.OpenSubKey(v);
                    if (productKey != null) {
                        try {
                            string pythonExePath = productKey.OpenSubKey("InstallPath").GetValue("ExecutablePath").ToString();
                            
                            // Comment this in to get (Default) value instead
                            // string pythonExePath = productKey.OpenSubKey("InstallPath").GetValue("").ToString();
                            
                            if (pythonExePath != null && pythonExePath != "") {
                                //Console.WriteLine("Got python version; " + v + " at path; " + pythonExePath);
                                pythonLocations.Add(v.ToString(), pythonExePath);
                            }
                        } catch {
                            //Install path doesn't exist
                        }
                    }
                }
            }

            if (pythonLocations.Count > 0) {
                System.Version desiredVersion = new System.Version(requiredVersion == "" ? "0.0.1" : requiredVersion),
                    maxPVersion = new System.Version(maxVersion == "" ? "999.999.999" : maxVersion);

                string highestVersion = "", highestVersionPath = "";

                foreach (KeyValuePair<string, string> pVersion in pythonLocations) {
                    //TODO; if on 64-bit machine, prefer the 64 bit version over 32 and vice versa
                    int index = pVersion.Key.IndexOf("-"); //For x-32 and x-64 in version numbers
                    string formattedVersion = index > 0 ? pVersion.Key.Substring(0, index) : pVersion.Key;

                    System.Version thisVersion = new System.Version(formattedVersion);
                    int comparison = desiredVersion.CompareTo(thisVersion),
                        maxComparison = maxPVersion.CompareTo(thisVersion);

                    if (comparison <= 0) {
                        //Version is greater or equal
                        if (maxComparison >= 0) {
                            desiredVersion = thisVersion;

                            highestVersion = pVersion.Key;
                            highestVersionPath = pVersion.Value;
                        } else {
                            //Console.WriteLine("Version is too high; " + maxComparison.ToString());
                        }
                    } else {
                        //Console.WriteLine("Version (" + pVersion.Key + ") is not within the spectrum.");
                    }
                }

                //Console.WriteLine(highestVersion);
                //Console.WriteLine(highestVersionPath);
                return highestVersionPath;
            }

            return "";
        }