I am using python because i try to run some queries from psql in cold state in a for loop.So before the execution of every query my cache must be clear! I imported os and then i did this:
if state=="cold":
os.system('sudo sh -c "sync; echo 3 > /proc/sys/vm/drop_caches"')
I am getting this output:
sh: 1: cannot create /proc/sys/vm/drop_caches: Permission denied
sudo: a terminal is required to read the password; either use the -S option to read from standard input or configure an askpass helper
I dont know how to fix this.
acorrding to this stack question:
how to pass sudo password from python script
you can try this:
password = 'my sudo password'
command = 'sh -c "sync; echo 3 > /proc/sys/vm/drop_caches"'
# formatting the sudo password and the command
shell_script = f"echo {password} | sudo -S {command}"
# running the script
os.system(shell_script)