NameError: name ‘Turtle‘ is not defined

class Turtle:#python 中的类名约定以大写字母开头
  #  ===关于类的一个简单例子===
    #属性
    color = 'green'
    weight = 10
    legs = 4
    shell = True
    mouth = '大嘴'
    #方法
    def climb(self):
        print('我正在努力的向前爬')

    def run(self):
        print('我正在飞快的向前跑')

    def bite(self):
        print('咬死你')

    def eat(self):
        print('有的吃满足。。')

    def sleep(self):
        print('困了')

>>> import turtle
>>> tt = Turtle()
Traceback (most recent call last):
  File "", line 1, in <module>
    tt = Turtle()
NameError: name 'Turtle' is not defined
>>> tt = Turtle()
Traceback (most recent call last):
  File "", line 1, in <module>
    tt = Turtle()
NameError: name 'Turtle' is not defined
>>> Turtle()
Traceback (most recent call last):
  File "", line 1, in <module>
    Turtle()
NameError: name 'Turtle' is not defined
>>> Turtle().climb()
Traceback (most recent call last):
  File "", line 1, in <module>
    Turtle().climb()
NameError: name 'Turtle' is not defined
>>> import Turtle
Traceback (most recent call last):
  File "", line 1, in <module>
    import Turtle
ModuleNotFoundError: No module named 'Turtle'
>>> import turtle
>>> tt = turtle()
Traceback (most recent call last):
  File "", line 1, in <module>
    tt = turtle()
TypeError: 'module' object is not callable
>>> 
=== RESTART: C:/Users/MR/AppData/Local/Programs/Python/Python36/xjy036.py ===
>>> tt = Turtle()
>>> Turtle()
<__main__.Turtle object at 0x00000210B04396A0>
>>> tt.climb()
我正在努力的向前爬
>>> tt.bite()
咬死你
>>> tt.sleep()
困了
>>> 

我可能就是传说中的憨憨本人了，这个地方小甲鱼明明是运行了第一个Turtle()文件，我以为他是在交互页面，害，听课不积极，早晚出问题。