Can someone tell me whats wrong with this?

[Mike Partin]

If someone could tell me what is wrong with this code I'd be very grateful.

def Cvs_Update():
     TmpMod = raw_input("Module: ")
     TmpGrep = "grep -w " + TmpMod + " /etc/hscvs.conf | awk -F= '{ print $2 }'"
     os.system("export CVSROOT='os.system(TmpGrep)'")
     os.system("echo $CVSROOT")
     #os.system(cmd)