I am not able to access the aliases in my environment within a Python script. If I pass the alias to os.system(), I get a message saying "sh: x: not found". I've tried sourcing my .bashrc file in the script, but this does not work. I would perfer not to source my or any rc file because this script should run other user's environments. My script allows me to run commands passed in as arguments, which include aliases to programs, so I can't hardcode any alias values in the program. For example, "myscript grep" would run grep by using os.system() in myscript.
Help would be appreciated.

Thanks.