stdout

问题 I am trying to get a handle on Windows stdout handles. I need to understand why there are different handles for STDOUT ( CONOUT$ ?) and how to interpret these differences. I know there are different output buffers used by the Windows API, but failt to understand (from the many MSDN docs) when and how to, use them. Using ctypes and python3, I can get 2 of these by the script below. However, running the script in (Cygwin) mintty/bash , PowerShell (6.1.1), CMD or even ConEmu , all yield slightly

问题 Standard streams are associated with a program. So, suppose there is a program already running in some way (I don't care how or in what way). The goal is to create pipes to the STDIN of the program from different processes (or programs) that run either locally or remotely and stream data into it asynchronously. Available information is (1) the host address and (2) the pid of the program only. How does one implement both cases in Python in this case? Edit: I should have mentioned this

问题 How can I write df.info() to file? I would like to include this in a sheet of the excel file where I write my df to using df.to_excel . According to the docs (pandas.DataFrame.info) it returns a buf : writable buffer, defaults to sys.stdout 回答1: I would try the following: f = open('df.info', 'w+') df.info(buf=f) f.close() 来源： https://stackoverflow.com/questions/35436331/how-to-save-output-from-dataframe-info-to-file-a-excel-or-text-file

问题 This question already has an answer here : Capturing the output of a very simple power shell script (1 answer) Closed 2 months ago . I'm trying to get the sitename of a device by using the hostname of a single device from an object that contains the details of 100's of devices in Powershell. How do I filter it? The data is originally from an API and is being pulled in as Json, I've converted it using ConvertFrom-Json so it should be in an object now. I have tried piping the object through

问题 Here's a "Hello world" program that uses WinAPI's WriteFile (compiled in Microsoft Visual C++ 2008 Express): int _tmain(int argc, _TCHAR* argv[]) { wchar_t str[] = L"Hello world"; HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE); if(out && out!=INVALID_HANDLE_VALUE) { WriteFile(out, str, sizeof(str), NULL, NULL); CloseHandle(out); } return 0; } If executed in a console window, it happily greets the world. If you try to redirect its standard output, however, as in hello.exe > output.txt the

问题 I'm trying to redirect the stdout of a function to a tkinter text widget. The problem I am running into is that it writes each line to a new window instead of listing everything in one. The function scans a directory and lists any file that is 0k. If no files are 0k it prints that. So, the problem is that if there are 30 0k files in a directory, it will open 30 windows with a single line in each. Now, I know what the problem is. If you look in my function code Zerok() I am telling it: if os

问题 This is elementary I guess: Let's consider this snippet: for i in range(3): sys.stdout.write(str(i) + '\n') out: 0 1 2 and this: for i in range(3): sys.stdout.write(str(i) + sys.argv[1]) out (after passing \n as argument): 0\n1\n2\n So, how can I pass new-line as argument? 回答1: sys.stdout.write(str(i) + sys.argv[1].decode("string_escape")) 来源： https://stackoverflow.com/questions/5715414/passing-n-new-line-on-stdout-throught-sys-argument

问题 printf("Error %d\n", 1); printf("\nStatus: %d%%", 50); prints Error 1 Status: 50% In this set up, is there any chance to insert Error 2\n between Error 1\n and \nStatus: 50% . I understand that \r and \b can be used to change printed text in the same line (e.g., if there is a single \n between Error 1 and Status: 50% ), but can I change text in a previous line? Thanks! 回答1: Sorry, you cannot. But you may issue system calls to clear the whole screen instead, like system("clear") (OS-dependent)

问题 I've been messing around in C trying to figure out how to do this. Let's say I have my main program, the parent process. The parent creates three child processes, each of which will eventually run programs (but that's not important right now). What I'd like to do is make it so that the first child's stdout will be received by the second child's stdin. The second child's stdout will then be received by the third child's stdin. The parent process's stdin/stdout aren't messed with at all. So far

问题 I apologize if this is a duplicate question, I searched a bit and couldn't find anything similar - I have a Python library that connects to my C# application via a socket in order to allow simple Python scripting (IronPython isn't an option right now for a couple of reasons). I would like to create a Windows Forms control that would be basically a graphical front-end for the Python interpreter, so that the user could run the interpreter without having to have a separate console window open. I