How to run one script in linux with double run protection?

Question

linux

in the crown set up launch via flock

*/1 * * * * flock -n /tmp/lock -c /var/www/python/x/run.sh > /var/www/python/x/logs/log.txt 2>&1

but it throws error
flock: -c requires exactly one command argument

like this also tried

*/1 * * * * flock -n /tmp/lock -c '/var/www/python/venv_x/bin/python3 /var/www/python/x/test.py' > /var/www/python/x/logs/log.txt 2>&1

Tell me how to fix or other options for running a python script in CentOs

Answer 1

Add to the beginning of the script to check a specific lck file and exit if it exists.
If not, create a file, run the script and delete the file.