standard.py 文件源码

def pythonast(self, args, tonative=False):
        arg, = args
        justlog = ast.Call(ast.Attribute(ast.Name("$math", ast.Load()), "log", ast.Load()), [arg], [], None, None)
        if self.base == math.e:
            if tonative:
                return justlog
            else:
                return ast.IfExp(ast.Compare(arg, [ast.Gt()], [ast.Num(0)]), justlog, ast.Num(-inf))
        else:
            scaled = ast.BinOp(justlog, ast.Div(), ast.Num(math.log(self.base)))
            if tonative:
                return scaled
            else:
                return ast.IfExp(ast.Compare(arg, [ast.Gt()], [ast.Num(0)]), scaled, ast.Num(-inf))