進程間通信Python

我在Python中編寫腳本，該腳本應該與軟件「ConsoleApplication.exe」通信（寫在C中）;這個最後一個開始等待從他的「標準輸入」中輸入一個固定的長度命令（5字節），並在上生成（在2-3秒後）他的「標準輸出」輸出，我應該在我的Python腳本中讀取它。進程間通信Python

＃

//This is the "ConsoleApplication.c" file 
#include <stdio.h> 
#include <function.h> 

char* command[5]; 
int main() 
{ 
while(1) 
{ 

scanf("%s\n", &command); 
output = function(command); 
print("%s\n", output); 

} 
}

＃

#this is Python code 

import subprocess 
#start the process 
p = subprocess.Popen(['ConsoleApplication.exe'], shell=True, stderr=subprocess.PIPE) 
#command to send to ConsoleApplication.exe 
command_to_send = "000648" 
#this seems to work well but I need to send a command stored into a buffer and if Itry 
#to use sys.stdout.write(command_to_send)nothing will happen. The problem seem that 
#sys.stdout.write expect an object I/O FILE 
while True: 
    out = p.stderr.read(1) 
    if out == '' and p.poll() != None: 
     break 
    if out != '': 
     sys.stdout.write(out) 
     sys.stdout.flush()

＃

有什麼建議？我該如何解決它？

我試圖用

stdout = p.communicate(input='test\n')[0]

但是我得到以下運行時錯誤：「類型錯誤：‘STR’不支持緩衝區接口」我也試過這個

from subprocess import Popen, PIPE, STDOUT 


p = Popen(['ConsoleApplication.exe'], stdout=PIPE, stdin=PIPE, stderr=PIPE) 

out, err = p.communicate(input='00056\n'.encode()) 
print(out) 
out, err = p.communicate(input='00043\n'.encode()) 
print(out)

但我得到這個錯誤：「ValueError：無法發送輸入後開始通信」

來源

2014-12-07 Carlo Di Maio