stdout

fflush(stdout) in c

由 扶醉桌前 提交于 2019-12-01 10:06:55
问题 Right when I am at fflush(stdout) and I break there in GDB, can I know what is there in stdout before I actually print it? How can I know what is there in stdout at any point in time? 回答1: You almost certainly can, but you probably shouldn't. The standard requires only that FILE be a type that is useful to the implementation to identify an open file and whatever state is required to implement the semantics of the various functions that operate on streams. I'd generally agree with other

Python - Print list of CSV strings in aligned columns

由 瘦欲@ 提交于 2019-12-01 09:31:58
I have written a fragment of code that is fully compatible with both Python 2 and Python 3 . The fragment that I wrote parses data and it builds the output as a list of CSV strings . The script provides an option to: write the data to a CSV file , or display it to the stdout . While I could easily iterate through the list and replace , with \t when displaying to stdout (second bullet option), the items are of arbitrary length, so don't line up in a nice format due to variances in tabs. I have done quite a bit of research, and I believe that string format options could accomplish what I'm after

Python - Print list of CSV strings in aligned columns

由 删除回忆录丶 提交于 2019-12-01 09:26:12
问题 I have written a fragment of code that is fully compatible with both Python 2 and Python 3 . The fragment that I wrote parses data and it builds the output as a list of CSV strings . The script provides an option to: write the data to a CSV file , or display it to the stdout . While I could easily iterate through the list and replace , with \t when displaying to stdout (second bullet option), the items are of arbitrary length, so don't line up in a nice format due to variances in tabs. I have

Access the printed output of a function call

由 别等时光非礼了梦想. 提交于 2019-12-01 09:25:29
Part of my script calls a function from (let's call it foo ) another module (written by someone else a long time ago, and I don't want to start modifying it now). foo writes interesting things to stdout (but returns None ), in part, by calling other functions as well. I want to access these interesting things that foo writes to stdout . As far as I know, subprocess is meant to call commands that I would normally call from the command line. Is there an equivalent for python functions that I would call from my script? I'm on python2.7, if it matters As @JimDeville commented, you can swap stdout:

Ncurses and Linux pipeline

由 主宰稳场 提交于 2019-12-01 09:22:59
问题 I'd like to write a simple program using ncurses for displaying some data. I would then like for the program to write to stdout in such a way that I can then use a pipe (|) on the command line to pipe some data out. My current attempt doesn't work. I can see the "GOT HERE"'s in a file using '>', but there's a whole bunch of other stuff. The program also exits immediately. #include <stdio.h> #include <ncurses.h> int main(int _argc, char ** _argv) { initscr(); /* Start curses mode */ printw(

Show command line results in Tkinter text widget

由 限于喜欢 提交于 2019-12-01 09:21:56
问题 I want the output of a Python script in a Tkinter text widget instead of in the command line. I have this script from https://stackoverflow.com/a/665598/3524043: from Tkinter import * import subprocess as sub p = sub.Popen('./Scripts/Speedtest.py',stdout=sub.PIPE,stderr=sub.PIPE, shell=True) output, errors = p.communicate() root = Tk() text = Text(root) text.pack() text.insert(END, output) root.mainloop() I've added shell=true at the subprocess, cause I had a OSError: [Errno 13] Permission

Access the printed output of a function call

由 十年热恋 提交于 2019-12-01 07:09:34
问题 Part of my script calls a function from (let's call it foo ) another module (written by someone else a long time ago, and I don't want to start modifying it now). foo writes interesting things to stdout (but returns None ), in part, by calling other functions as well. I want to access these interesting things that foo writes to stdout . As far as I know, subprocess is meant to call commands that I would normally call from the command line. Is there an equivalent for python functions that I

Using standard io stream:stdin and stdout in a matlab exe

由 不想你离开。 提交于 2019-12-01 06:09:38
Question I want it to 'listen' to the standard input stream in a running (compiled) Matlab executable. This is how I believe it is done in c or a similar language: #include stdio.h fgets(line, 256, stdin) Or more elaborately, it it can be used as such: if (!fgets(line, 256, stdin)) return; if (line[0] == '\n') continue; sscanf(line, "%s", command); Answer For completeness I will leave the background and notes intact, but with the help of Amro and EitanT I have managed to work it out. Background I have found how to do this in other languages, and here are some instructions for the compilation

Printing to stdout and file simultaneously [duplicate]

由 僤鯓⒐⒋嵵緔 提交于 2019-12-01 05:28:49
This question already has an answer here: Perl: Print on the “display” and also into a file 4 answers I have a Perl script with several print statements. Is there a way by which I can direct all of these print statements to a file as well as to stdout simultaneously without duplicating print statements ? friedo You can use File::Tee . use File::Tee qw(tee); tee STDOUT, '>>', 'some_file.out'; print "w00p w00p"; If File::Tee is unavailable, it is easily simulated with a pipeline: open my $tee, "|-", "tee some_file.out"; print $tee "w00p w00p"; close $tee; 来源： https://stackoverflow.com/questions

How to redirect all console output to a Swing JTextArea/JTextPane with the right encoding?

由 本小妞迷上赌 提交于 2019-12-01 05:12:30
I've been trying to redirect System.out PrintStream to a JTextPane. This works fine, except for the encoding of special locale characters. I found a lot of documentation about it (see for ex. mindprod encoding page ), but I'm still fighting with it. Similar questions were posted in StackOverFlow, but the encoding wasn't addressed as far as I've seen. First solution: String sUtf = new String(s.getBytes("cp1252"),"UTF-8"); Second solution should use java.nio. I don't understand how to use the Charset. Charset defaultCharset = Charset.defaultCharset() ; byte[] b = s.getBytes(); Charset cs =
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