Question

I am executing a program with a combination of different parameters. I need to keep track of exactly which parameters were supplied with the program at command line. I am maintaining a log file where I need to store these issued commands alogwith summary of the result.

for example, I may issue following commands at different times.

$python myprog.py -i input.txt -o output.txt -x 2 -y 3 -z 9
$python myprog.py  input.txt -o output.txt -x 2  -z 9
$python myprog.py -i input.txt -o output.txt -x 2 -y 3 
$python myprog.py -i input.txt -o output.txt  -z 9

How can I store these commands into my log file?

I am doing this because I might need to re-execute the same program with exact same options.

Answer 1

You can use the module sys to get all arguments as a list, argv.
To log them to a text file you can use this piece of code:

import sys
logfile = open("logfile.txt", "w")
logfile.write(" ".join(sys.argv))
logfile.close()