How to store the output of a command in a variable at the same time as printing the output?
Use tee to direct it straight to screen instead of stdout $ var=$(echo hi | tee /dev/tty) hi $ echo $var hi
stdout
How can I run an external command and capture its output in Perl?
You can use the backtics to execute your external program and capture its stdout and stderr. By default the backticks discard the stderr and return only the stdout of the external program.So $output = `cmd`; Will capture the stdout of the program cmd and discard stderr. To capture only stderr you can use the shell’s … Read more
remove last STDOUT line in Python
You might be able to do what you want with VT100 control codes. Something like this maybe: CURSOR_UP_ONE = ‘\x1b[1A’ ERASE_LINE = ‘\x1b[2K’ print(CURSOR_UP_ONE + ERASE_LINE)
How to silence statsmodels.fit() in python
Use the disp argument to fit. It controls the verbosity of the optimizers in scipy. mod.fit(disp=0) See the documentation for fit.
Python – reset stdout to normal, after previously redirecting it to a file
The original stdout can be accessed as sys.__stdout__. This is documented.
How to log output in bash and see it in the terminal at the same time?
update-client 2>&1 | tee my.log 2>&1 redirects standard error to standard output, and tee sends its standard input to standard output and the file.
Redirecting stdout and stderr to a PyQt4 QTextEdit from a secondary thread
Firstly, +1 for realising how thread-unsafe many of the examples on stack overflow are! The solution is to use a thread-safe object (like a Python Queue.Queue) to mediate the transfer of information. I’ve attached some sample code below which redirects stdout to a Python Queue. This Queue is read by a QThread, which emits the … Read more
Live stdout output from Python subprocess in Jupyter notebook
The ipython notebook has it’s own support for running shell commands. If you don’t need to capture with subprocess stuff you can just do cmd = ‘ls -l’ !{cmd} Output from commands executed with ! is automatically piped through the notebook.
How do you edit existing text (and move the cursor around) in the terminal?
Finally found that “demo”: https://github.com/asyncly/cdir/blob/223fe0039fade4fad2bb08c2f7affac3bdcf2f89/cdir.js#L24 http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x361.html http://ascii-table.com/ansi-escape-sequences-vt-100.php Position the Cursor: \u001b[<L>;<C>H or \u001b[<L>;<C>f (puts the cursor at line L and column C) Move the cursor up N lines: \u001b[<N>A Move the cursor down N lines: \u001b[<N>B Move the cursor forward N columns: \u001b[<N>C Move the cursor backward N columns: \u001b[<N>D Clear the screen, move to … Read more