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Questions tagged [stdout]

The standard output stream (stdout) is the stream where a program writes its output data.

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Can anyone give me a quick tutorial in stdin and stdout in Python 3?

I know this sounds like something I can google, but the truth is that I don't find or do not understand what the very few Python 3 sources explains. So here are my questions: Is input() the stdin function in Python 3? Does that mean that when you…
Martin Hallén
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Chain of piped commands, each outputting status to standard error

I have a chain of piped commands in a bash script, piping standard output to standard input: prog1 | prog2 | prog3 and they each output something to standard error. Some of them output overwriting the previous line, some do not, some do both: e.g.…
Michal Charemza
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Capturing contents of standard output in Java

I am invoking a function that is printing some string in my console/standard output. I need to capture this string. I cannot modify the function that is doing the printing, nor change runtime behavior through inheritance. I am unable to find any…
Shailesh Tainwala
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How to execute a command and get return code stdout and stderr of command in C++

Given the following answer (first c++11 answer): How do I execute a command and get the output of the command within C++ using POSIX? Here is the implementation for your convenience: #include #include #include #include…
code_fodder
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How do I avoid getting data printed to stdout in my return value?

In doing some Powershell automation, I'm having trouble with the way that data written to stdout by a .cmd file is automatically captured. I have two functions that do something like the following: function a { & external.cmd # prints "foo" …
JSBձոգչ
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How to capture a Processes STDOUT and STDERR line by line as they occur, during process operation. (C#)

I am going to execute a Process (lame.exe) to encode a WAV file to MP3. I want to process the STDOUT and STDERR of the process to display progress information. Do I need to use threading? I can't get my head around it. Some simple example code would…
dave
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How to print stdout immediately?

How can I immediately output stdout? stdout is going to print after all input is complete. require 'open3' def run(cmd) Open3.popen3(cmd) do |stdin, stdout, stderr, thread| Thread.new do stdout.each {|l| puts l} end …
xitryuga
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How to change the stdin and stdout encoding on Python 2

I'm using Windows and Linux machines for the same project. The default encoding for stdin on Windows is cp1252, and on Linux it is utf-8. I would like to change everything to utf-8. Is it possible? How can I do it? This question is about Python 2;…
duduklein
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Output binary data on PowerShell pipeline

I need to pipe some data to a program's stdin: First 4 bytes are a 32-bit unsigned int representing the length of the data. These 4 bytes are exactly the same as C would store an unsigned int in memory. I refer to this as binary data. Remaining…
johnnycrash
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Redirect nohup's stderr to nohup.out

How do I run a command with nohup so that both the stdout and stderr are saved to nohup.out? By default only stdout is saved and stderr is discarded.
Timmmm
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Ordering Output in MPI

in a simple MPI program I have used a column wise division of a large matrix. How can I order the output so that each matrix appears next to the other ordered ? I have tried this simple code the effect is quite different from the wanted: for(int…
GBBL
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VBscript code to capture stdout, without showing console window

This is a VBScript code example that shows how to catch whatever a command line program sends to standard output. It executes the command xcopy /? and shows the output in a message box. Before the message box appears, for a split second you see the…
mgr326639
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Test output to php://stdout with PHPUnit

I am using Symfony\Component\Console\Output\ConsoleOutput to write to the console. Explicitly, I am writing to php://stdout. In my unit tests, I would like to be able to check the output to the console. Using the PHPUnit method expectOutputString(),…
Jonathan Maron
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Possible to capture PHP echo output?

So I have a function such as: public static function UnorderedList($items, $field, $view = false){ if(count($items) > 0){ echo '
    '; foreach($items as $item){ echo '
  • '; if($view){ …
Chris
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How to capture print output of another module?

I was wondering if this is possible in python: # module1 def test(): print('hey') # module2 import module1 module1.test() # prints to stdout Without modifying module1 is there any way to wrap this in module2 so that I can capture…
waka-waka-waka
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