Python错误:模块“turtle”没有属性“Pen”

我在编写python并尝试使用turtle,但它给了我这样的响应:

    [Clang 6.0 (clang-600.0.57)] on darwin
    Type "help", "copyright", "credits" or "license()" for more information.
    >>> import turtle
    >>> t = turtle.Pen()
    Traceback (most recent call last):
      File "<pyshell#1>", line 1, in <module>
        t = turtle.Pen()
    AttributeError: module 'turtle' has no attribute 'Pen'