爲什麼循環無法正常運行

我不明白爲什麼循環不運行我的Python腳本。爲什麼循環無法正常運行

import gtk, sys 
from ctypes import * 

PIPE_ACCESS_DUPLEX = 0x3 
PIPE_TYPE_MESSAGE = 0x4 
PIPE_READMODE_MESSAGE = 0x2 
PIPE_WAIT = 0 
PIPE_UNLIMITED_INSTANCES = 255 
BUFSIZE = 9600 
NMPWAIT_USE_DEFAULT_WAIT = 0 
INVALID_HANDLE_VALUE = -1 
ERROR_PIPE_CONNECTED = 535 

MESSAGE = "Default answer from server\0" 
szPipename = "\\\\.\\pipe\\mynamedpipe" 

def ReadWrite_ClientPipe_Thread(hPipe): 
    chBuf = create_string_buffer(BUFSIZE) 
    cbRead = c_ulong(0) 
    while True: 
     fSuccess = windll.kernel32.ReadFile(hPipe, chBuf, BUFSIZE, byref(cbRead), None) 
     if ((fSuccess ==1) or (cbRead.value != 0)): 
      messageArd = chBuf.value 
      cbWritten = c_ulong(0) 
      fSuccess = windll.kernel32.WriteFile(hPipe,c_char_p(MESSAGE), len(MESSAGE), byref(cbWritten), None) 
    windll.kernel32.FlushFileBuffers(hPipe) 
    windll.kernel32.DisconnectNamedPipe(hPipe) 
    windll.kernel32.CloseHandle(hPipe) 
    return 0 

def main(): 
    THREADFUNC = CFUNCTYPE(c_int, c_int) 
    thread_func = THREADFUNC(ReadWrite_ClientPipe_Thread) 
    while True: 
     print "Print test" #This should be repeated 
     hPipe = windll.kernel32.CreateNamedPipeA(szPipename,PIPE_ACCESS_DUPLEX,PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE | PIPE_WAIT,PIPE_UNLIMITED_INSTANCES,BUFSIZE, BUFSIZE,NMPWAIT_USE_DEFAULT_WAIT,None) 
     fConnected = windll.kernel32.ConnectNamedPipe(hPipe, None) 
     if ((fConnected == 0) and (windll.kernel32.GetLastError() == ERROR_PIPE_CONNECTED)): 
      fConnected = 1 

     if (fConnected == 1): 
      dwThreadId = c_ulong(0) 
      hThread = windll.kernel32.CreateThread(None, 0,thread_func, hPipe, 0, byref(dwThreadId)) 

    gtk.main() 

if __name__ == "__main__": 
    main()

這應該重複：

print "Print test"

如果我更改高清主或刪除命名管道的腳本，循環將正常運行。

def main(): 
    while True: 
     print "Print test" #This should be repeated 
    gtk.main()

有人可以幫我解決這個問題嗎？謝謝

來源

2012-03-17 Varanka

您能告訴我們輸出/錯誤消息嗎？ – mfrankli 2012-03-17 07:47:37

試圖把一個調試器，看看它去哪裏。 – Doboy 2012-03-17 08:06:18

沒有錯誤。循環只運行一次，只打印1次「打印測試」。它應該永遠循環。 – Varanka 2012-03-17 11:17:38

解決的問題。

循環不起作用，因爲有兩個併發運行的循環，多線程解決方案。要同時運行兩個循環

來源

2012-03-21 14:03:19 Varanka

爲什麼循環無法正常運行

回答

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