Is it possible to modify bash to run one command through another (say a python script)?

Question

I was wondering if it is possible to modify bash such that when I type

command --arg1

what actually happens is

~/prerun.py command --arg1

(prerun.py would handle starting command --arg1 itself)

Thanks!

Answer 1

command () {
    prerun.py some_command $@
}

Then when you run command --arg1 it will pass it all on to the prerun.py script.

Answer 2

Define an alias with the alias builtin:

alias command='~/prerun.py command'