windows

问题 It seems that a successful test of the existence of a windows named pipe by using os.path.exists() prevents the pipe from working. Why would this be? Here is successfully working windows named-pipe code: import time import multiprocessing as mp import win32pipe, win32file PIPENAME = r'\\.\pipe\Foo' def producer(pipe_name: str): print('producer') # if not os.path.exists(pipe_name): # print(f'No pipe {pipe_name}') # return pipe = win32file.CreateFile(pipe_name, win32file.GENERIC_READ |

问题 I am observing a strange behavior when resizing QWindow . When I resize the window so that both width and height are increasing or decreasing, then the window does not flicker with white background. But when I increase width while decreasing height (or vice versa) the window flickers and temporarily fill the new are with white color. This is a very annoying effect especially when I have a dark theme in my application and I resize the window. To experiment with this I used "rasterwindow"

问题 I'm kinda confused. When a file is dragged onto a window with WS_EX_ACCEPTFILES flagged it places a PostMessage into the WndProc function, which sets UINT message to WM_DROPFILES and, according to https://msdn.microsoft.com/en-us/library/windows/desktop/bb774303(v=vs.85).aspx the WPARAM = (WPARAM) (HDROP) hDrop; So am I wrong to assume that I can use the WPARAM to initialize the HDROP or just pass it into the DragQueryFile ?? LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam,

问题 I'm kinda confused. When a file is dragged onto a window with WS_EX_ACCEPTFILES flagged it places a PostMessage into the WndProc function, which sets UINT message to WM_DROPFILES and, according to https://msdn.microsoft.com/en-us/library/windows/desktop/bb774303(v=vs.85).aspx the WPARAM = (WPARAM) (HDROP) hDrop; So am I wrong to assume that I can use the WPARAM to initialize the HDROP or just pass it into the DragQueryFile ?? LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam,

问题 I have a client whose data has been moved from the H drive to the I drive, but their Access export script seems to have hardcoded the H drive as the destination even though it no longer exists on the new system. How would I create an H drive that maps to the I drive? I'm a unix/linux guy. I'm guessing something like mklink /d H: I: ? Would that work? 回答1: No, mklink isn't going to do it for you. What you need to do is to create a virtual hard drive (VHD) and copy the client's data to it. (Or

问题 This question already has answers here : Installing numpy with pip on windows 10 for python 3.7 (3 answers) Closed 4 months ago . I'm trying to install NumPy but I'm facing an issue. The python ver I'm using is 3.9 and Windows version is 10. The error is as follows: C:>pip3 install numpy Collecting numpy Using cached numpy-1.19.2.zip (7.3 MB) Installing build dependencies ... done Getting requirements to build wheel ... done Preparing wheel metadata ... error ERROR: Command errored out with

问题 I try to read memory at address of a process that's the code : std::cout << "Found Process " << procEntry32.szExeFile << " With process ID " << procEntry32.th32ProcessID << std::endl; hProc == OpenProcess(PROCESS_ALL_ACCESS, FALSE, procEntry32.th32ProcessID); pID = procEntry32.th32ProcessID; if (hProc == NULL) { std::cout << "failed getting handle" << std::endl; } CloseHandle(hProcSnap); std::cout << "hProcSnap handle closed ... " << std::endl; return true; Code Output I use DWORD64 This code

问题 I try to read memory at address of a process that's the code : std::cout << "Found Process " << procEntry32.szExeFile << " With process ID " << procEntry32.th32ProcessID << std::endl; hProc == OpenProcess(PROCESS_ALL_ACCESS, FALSE, procEntry32.th32ProcessID); pID = procEntry32.th32ProcessID; if (hProc == NULL) { std::cout << "failed getting handle" << std::endl; } CloseHandle(hProcSnap); std::cout << "hProcSnap handle closed ... " << std::endl; return true; Code Output I use DWORD64 This code

问题 How to keep a node application running in windows even when user logs off? Also how to keep running a node http-server even after user log-off? 回答1: You have 2 great options. One is as mentioned in comments above Forever. The other is PM2 which is easy to install and offers an incredible amount of options. I use this in all projects, but I cannot attest to the Windows version as I am on Linux & Ubuntu servers and work on a Mac. You can daemonize your node process, follow logs, cluster it and

问题 I am running a Python 3.7 Flask application which uses flask_socketio to setup a socketio server for browser clients, another python process to connect to a separate remote socketio server & exchange messages, and another python process to read input from a PIR sensor. Both python processes communicate over multiprocessing.Queue - but, the socketio process always gets either [WinError6] - Invalid Handle or [WinError5] - Permission Denied . I have absolutely no idea what I'm doing wrong. Here