os.system

i wrote a small script on python that calls a command line from the console in order to hibernate a linux machine (or shut itself down in case one word is changed) and then wake up after some time. The command is called again again and again through the watch command. import os import time os.system("watch -n 20 sudo rtcwake -u -s 10 -m mem") So the rtcwake command is called again 20 seconds after the pc has wokn up again. I would like another script to be run every time the computer wakes up. I already have this other script, it is a countdown. I want to do this in order to show the user how

I want to pass two variables to the os.system() for example listing files in different format in specific directory like (ls -l testdirectory) in which both a switch and test directory are variable. I know for single variable this one works: option=l os.sytem('ls -%s' option) but I dont know how to pass two variables? you are asking about string formating (since os.system takes a string, not a list of arguments) cmd = "ls -{0} -{1}".format(var1,var2) #or cmd = "{0} -{1} -{2}".format("ls","l","a") os.system(cmd) or cmd = "ls -%s -%s"%(var1,var2) or cmd = "ls -"+var1+" -"+var2 This, for example,

I am using os.system to copy a file from a system to another. The logic of a very simple program is to execute another set of commands after this file gets copied. The problem is that os.system does not actually wait for the file to be copied, and gets to executing the next line. This causes issues to the system. I could actually give some wait functions, through time.sleep() , but we have to copy files with sizes ranging from 500 MB to sometimes 20 GB, and the times taken are very different. What's the solution? I need to somehow tell my program that the files are copied, and then to execute

The Python program I'm writing needs to start a local PHP script outside of Python's process. The program also needs to pass params to the PHP script. So far this seems to start the script: os.system( path_to_script_here param param ) However, I'm pretty certain that Python remains running until the PHP script is complete. I've also looked at the various os.spawn methods and I'm not sure which would be appropriate for my case. Any ideas? Thanks! miku See: How to start a background process in Python? 来源： https://stackoverflow.com/questions/2931061/start-local-php-script-w-local-python-script

I have a python script to install/uninstall some regularly used programs for me and it also does some shortcut/folder clean up after uninstall. I used to use this code to delete a folder os.system('rd /S /Q "{0}\\{1}"'.format(dirname, name)) which worked just fine. I am attempting to convert my usage of os.system to subprocess.call so I changed the above line to this subprocess.call(['rd', '/S', '/Q', '{0}\\{1}'.format(dirname, name)]) but this gives the error The system cannot find the file specified (2) I must be using subprocess.call incorrectly but I can't work it out. Any help would be

I have a script that I need to automate, so it's a .sh script which I want to run inside a python script: something like this: import os os.system('./script.sh -p 1234') The script script.sh needs the user to input 3 fields, 1) the sudo password, 2) a string and 3) a string. Enter password for user: xxxx #typed by me Enter Auth Username: xxxx #typed by me Enter Auth Password: xxx #typed by me How can I make the python script to type/insert/pass those 3 needed values to script.sh . You can use subprocess.Popen to start the script and the communicate method to pass it input. Something like this:

I have this python code: import os try: os.system('wrongcommand') except: print("command does not work") The code prints: wrongcommand: command not found Instead of command does not work . Does anyone know why it's not printing my error message? If you want to have an exception thrown when the command doesn't exist, you should use subprocess : import subprocess try: subprocess.call(['wrongcommand']) except OSError: print ('wrongcommand does not exist') Come to think of it, you should probably use subprocess instead of os.system anyway ... Andreas Jung Because os.system() indicates a failure