Das deutsche Python-Forum

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import subprocess

while True:
    publish = subprocess.Popen(
        ["/home/pi/neu/bin/python3.7",  
        "/home/pi/sktripte/rumspielen3.py"])

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while (1):
    print("hello vom Subprozess")

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while True:

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while (1):

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import subprocess
import os


def executeCpp():
    # create a pipe to a child process
    data, temp = os.pipe()

    # write to STDIN as a byte object(convert string
    # to bytes with encoding utf8)
    os.write(temp, bytes("5 10\n", "utf-8"));
    os.close(temp)

    # store output of the program as a byte string in s
    s = subprocess.check_output("g++ HelloWorld.cpp -o out2;./out2", stdin=data,shell=True)

    # decode s to a normal string
    print(s.decode("utf-8"))


if __name__=="__main__":
    while True:
        executeCpp()
/[code]
und eine C++ Datei mit:
[code]
#include <iostream>
using namespace std;
int main()
{
    int a, b;
    cin >> a >> b;
    
     cout << "Hello World from C++.Values are:" << a << " " << b;
    
    return 0;
}

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#include <iostream>
using namespace std;
int main()
{
    int a, b;
    cin >> a >> b;
    
     cout << "Hello World from C++.Values are:" << a << " " << b;
    
    return 0;
}

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import subprocess

proc = subprocess.Popen("/home/pi/test.sh",stdin=subprocess.PIPE,stdout=subprocess.PIPE)

state = "run"
while state == "run":
    input = input("first") #Nachricht, die an C++ Skript gesendet wird. Es sollte First Hello! zurückkommen

    if input == "quit":
        state = "terminate" # any string other than "run" will do

    proc.stdin.write(input + "\n")
    cppMessage = proc.stdout.readline().rstrip("\n")
    print ("cppreturn message ->" + cppMessage + " written by python \n")
    print ("test")

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#!/bin/bash
g++ -o Test1 /home/pi/helloFromC.cpp
sudo ./Test1

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#include <iostream>
#include <string>

using namespace std;

int main(int argc, char* args[]){

    string python_message = "";
    bool quit = false;

    while (!quit){
        cin >> python_message;

        if (python_message == "quit"){
            quit = true;
        }
        else if (python_message == "first"){
            cout << "First Hello!" << endl;
        }
        else if (python_message == "second"){
            cout << "Second Hello!" << endl;
        }
        else if (python_message == "third"){
            cout << "Third Hello!" << endl;
        }
        else {
            cout << "Huh?" << endl;
        }
    }
    return 0;
}

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import subprocess

def main():
    proc = subprocess.Popen("/home/pi/test.sh", stdin=subprocess.PIPE, stdout=subprocess.PIPE)
    while True:
        command = input("first") #Nachricht, die an C++ Skript gesendet wird. Es sollte First Hello! zurückkommen
        proc.stdin.write(command + "\n")
        proc.stdin.flush()
        cpp_message = proc.stdout.readline().rstrip("\n")
        print(f"cppreturn message -> {cpp_message} written by python")
        print("test")
        if command == "quit":
            break

if __name__ == '__main__':
    main()