code: def p_DEFS(p):  # Define bytes
      
      if len(p[2]) > 2:
          error(p.lineno(1), "too many arguments for DEFS")
  
      if len(p[2]) < 2:
          num = Expr.makenode(Container(0, p.lineno(1)))  # Defaults to 0
          p[2] = p[2] + (num,)
  
      p[0] = Asm(p.lineno(1), 'DEFS', p[2])
docs: asm : DEFS number_list