You can use subprocess
module.
import subprocess
subprocess.call(["tclsh", "oommf.tcl", "avf2odt", "-average", "space", "-axis", "z", "-onefile", "<filename>.txt", "-headers", "none", "-ipat", "*.omf"])
See https://docs.python.org/2/library/subprocess.html#subprocess.call
3
solved Use python to run a command line [duplicate]