stdout

问题 I would like to catch all the inputs and output of a commandline program (namely, GDB, but currently changed to ls or cat for simplicity) and redirect it into a file, for later analysis. I couldn't get anything close to working, but I can't understand what's wrong. Here is my last attempt: #!/usr/bin/env python2 import subprocess import sys import select import os def get_pipe(): fd_r, fd_w = os.pipe() return os.fdopen(fd_r, "r"), os.fdopen(fd_w, "w") out_r, out_w = get_pipe() err_r, err_w =

问题 I would like to catch all the inputs and output of a commandline program (namely, GDB, but currently changed to ls or cat for simplicity) and redirect it into a file, for later analysis. I couldn't get anything close to working, but I can't understand what's wrong. Here is my last attempt: #!/usr/bin/env python2 import subprocess import sys import select import os def get_pipe(): fd_r, fd_w = os.pipe() return os.fdopen(fd_r, "r"), os.fdopen(fd_w, "w") out_r, out_w = get_pipe() err_r, err_w =

问题 I need to write a C program ( myprogram ) which checks output of other programs. It should basically work like this: ./otherprogram | ./myprogram But I could not find how to read line-by-line from stdout (or the pipe), and then write all this to stdout . 回答1: Create an executable using: #include <stdio.h> int main() { char line[BUFSIZ]; while ( fgets(line, BUFSIZ, stdin) != NULL ) { // Do something with the line of text } } Then you can pipe the output of any program to it, read the contents

问题 Here from output I want only json data with requestStatus Failed part only. remaining json data should be override each update/can be deleted. could you pls suggest me how can I get data which is only required. source Code: my source code looks like this. cmd := exec.Command(command, args...) cmd.Dir = dir var stdBuffer bytes.Buffer mw := io.MultiWriter(os.Stdout, &stdBuffer) cmd.Stdout = mw cmd.Stderr = mw // Execute the command if err := cmd.Run(); err != nil { log.Panic(err) } log.Println

问题 I'm using Python 3.6 on Windows. When I run a script using the standard Windows shell ( cmd.exe ), the default text encoding for stdin/stdout is 'utf-8' as expected in Python 3.x: python -c "import sys; print(sys.stdout.encoding)" utf-8 However, the same command on the IDLE shell leads to a different result, which is clearly annoying, especially for beginner students using IDLE as a first step IDE >>> import sys; print(sys.stdout.encoding) cp1252 It happens that IDLE defines PseudoOutputFile

问题 I am trying to build an application that enables the user to interact with a command-line interactive shell, like IRB or Python. This means that I need to pipe user input into the shell and the shell's output back to the user. I was hoping this was going to be as easy as piping STDIN, STDOUT, and STDERR, but most shells seem to respond differently to STDIN input as opposed to direct keyboard input. For example, here is what happens when I pipe STDIN into python : $ python 1> py.out 2> py.err

问题 I am trying to build an application that enables the user to interact with a command-line interactive shell, like IRB or Python. This means that I need to pipe user input into the shell and the shell's output back to the user. I was hoping this was going to be as easy as piping STDIN, STDOUT, and STDERR, but most shells seem to respond differently to STDIN input as opposed to direct keyboard input. For example, here is what happens when I pipe STDIN into python : $ python 1> py.out 2> py.err

问题 I was assuming that sys.stdout would be referencing the same physical stream as iostreams::cout running in the same process, but this doesn't seem to be the case. The following code, which makes a call to a C++ function with a python wrapper called "write", that writes to cout: from cStringIO import StringIO import sys orig_stdout = sys.stdout sys.stdout = stringout = StringIO() write("cout") # wrapped C++ function that writes to cout print "-" * 40 print "stdout" sys.stdout = orig_stdout

问题 I was assuming that sys.stdout would be referencing the same physical stream as iostreams::cout running in the same process, but this doesn't seem to be the case. The following code, which makes a call to a C++ function with a python wrapper called "write", that writes to cout: from cStringIO import StringIO import sys orig_stdout = sys.stdout sys.stdout = stringout = StringIO() write("cout") # wrapped C++ function that writes to cout print "-" * 40 print "stdout" sys.stdout = orig_stdout

问题 I'll try to be much clear as possible. I have a very simple test script that control a Power Supply, the script measure some current from the Agilent Power Supply + Unit Under Test, then, the script print these readings as simple as: PS.write(b"MEAS:CURR? \n") time.sleep(2) response = PS.read(1000) time.sleep(3) print(response) (float(response)*1) E3632A=(float(response)*1) print (E3632A) When the script excecute the "print command" (print (E3632A), all the information is displayed into the