docs: def modify_macho_file_headers(macho_file_path, modificator_func):
  	""" Modifies headers of a Mach-O file at the given path by calling
  	the modificator function on each header.
  	
  	Returns True on success, otherwise rises an exeption (e.g. from macholib)
  	"""
  	if not os.path.isfile(macho_file_path):
  		raise Exception("You must specify a real executable path as a target")
  		return False
  		
  	m = MachO(macho_file_path)
  	apply_to_headers(m, modificator_func)
  	save_macho(m, macho_file_path)
  	return True