How to pass -i and -o as different file path

Hi,
in my ubuntu os, i tried with
`python3 /var/www/html/apps/color_trace/color_trace_multi.py -i /var/www/html/apps/color_trace/test.png -o /var/www/html/apps/color_trace/after.svg -c 8
`but its gives error
`color_trace_multi.py: error: argument -i/--input: expected at least one argument`
