I want to write a function that will execute a shell command and return its output as a string, no matter, is it an error or success message. I just want to get the same result that I would have gotten with the command line.
Should I put the shebang in my Python scripts? In what form?
I’m using a python script as a driver for a hydrodynamics code. When it comes time to run the simulation, I use subprocess.Popen to run the code, collect the output from stdout and stderr into a subprocess.PIPE — then I can print (and save to a log-file) the output information, and check for any errors. The problem is, I have no idea how the code is progressing. If I run it directly from the command line, it gives me output about what iteration its at, what time, what the next time-step is, etc.
I’m trying to write a small script to mount a VirtualBox shared folder each time I execute the script. I want to do it with Python, because I’m trying to learn it for scripting.
I am running several cat | zgrep commands on a remote server and gathering their output individually for further processing:
I am using Python’s Paramiko library to SSH a remote machine and fetch some output from command-line. I see a lot of junk printing along with the actual output. How to get rid of this?
When using os.system() it’s often necessary to escape filenames and other arguments passed as parameters to commands. How can I do this? Preferably something that would work on multiple operating systems/shells but in particular for bash.
I’m using Python with -c to execute a one-liner loop, i.e.:
I am trying to run sesu command in Unix server from Python with the help of Paramiko exec_command. However when I am running this command exec_command('sesu test'), I am getting
I find myself frequently using Python’s interpreter to work with databases, files, etc — basically a lot of manual formatting of semi-structured data. I don’t properly save and clean up the useful bits as often as I would like. Is there a way to save my input into the shell (db connections, variable assignments, little for loops and bits of logic) — some history of the interactive session? If I use something like script I get too much stdout noise. I don’t really need to pickle all the objects — though if there is a solution that does that, it would be OK. Ideally I would just be left with a script that ran as the one I created interactively, and I could just delete the bits I didn’t need. Is there a package that does this, or a DIY approach?