从 C# .net 调用 python.py [英] calling python.py from C# .net
问题描述
我在从 C# 调用 python 脚本时遇到问题.我的 python 脚本根据参数 1 和参数 2 计算一个值并发送计算值.我无法获得计算值.说,例如我正在学习一个简单的 python 类并调用 C#
I have a problem in calling a python script from C#. My python script computes a value based on param 1 and param 2 and sends the computed value. I am not able to get the computed value. say, for example I am taking a simple python class and calling for C#
下面是python.py:
the below is python.py :
import argparse
class demo:
def add(self,a,b):
return a+b
def main(a,b):
obj=demo()
value=obj.add(a,b)
print(value)
return value
if __name__ == "__main__":
arg_parse = argparse.ArgumentParser()
arg_parse.add_argument("a")
arguments = arg_parse.parse_args()
main(arguments.a,3)
下面是调用它的 C# 代码.
below is the C# code to call it.
Process p = new Process();
int a = 2;
p.StartInfo.FileName = "C:\\Users\\xyx\\AppData\\Local\\Programs\\Python\\Python36-32\\pythonw\\python.exe";
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.CreateNoWindow = true;
p.StartInfo.Arguments = "C:\\Users\\xyx\\AppData\\Local\\Programs\\Python\\Python36-32\\pythonw\\python.py "+a; parameter
p.Start();
StreamReader s = p.StandardOutput;
standardError = s.ReadToEnd();
output = s.ReadToEnd().Replace(Environment.NewLine, string.Empty);
p.WaitForExit();
由于 2,3 在 python 中被发送到 main(),我想要 '5' 回来.我不知道如何取回它.请帮忙
Since 2,3 are sent to main () in python, I want '5'back. I do not know how to get it back. Please help
推荐答案
以下代码片段对我有用:调用 Python 的 C# 代码
The following code snippet worked for me : C# code to call Python
using System;
using System.Diagnostics;
using System.IO;
namespace ScriptInterface
{
public class ScriptRunner
{
//args separated by spaces
public static string RunFromCmd(string rCodeFilePath, string args)
{
string file = rCodeFilePath;
string result = string.Empty;
try
{
var info = new ProcessStartInfo(@"C:\Users\xyz\AppData\Local\Programs\Python\Python37\python.exe");
info.Arguments = rCodeFilePath + " " + args;
info.RedirectStandardInput = false;
info.RedirectStandardOutput = true;
info.UseShellExecute = false;
info.CreateNoWindow = true;
using (var proc = new Process())
{
proc.StartInfo = info;
proc.Start();
proc.WaitForExit();
if (proc.ExitCode == 0)
{
result = proc.StandardOutput.ReadToEnd();
}
}
return result;
}
catch (Exception ex)
{
throw new Exception("R Script failed: " + result, ex);
}
}
public static void Main()
{
string args = "1 2";
string res = ScriptRunner.RunFromCmd(@"your file path", args);
}
}
}
以及以下 Python 代码,它接受两个输入并返回它们的总和:
and following Python Code which takes two inputs and returns the sum of those:
import sys
def add_numbers(x,y):
sum = x + y
return sum
num1 = int(sys.argv[1])
num2 = int(sys.argv[2])
print(add_numbers(num1, num2))
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