如何让我的代码编写python三角形？

我一直在试着画一个三角形，然后用乌龟把它画出来。我希望人们能够导入值，我的程序会说它是否是三角形。如果它是三角形，那么我的程序会把它写出来。如果没有，它将给出错误。当我测试代码时，它说angle1未定义。在第56行中，我尝试将角度1和所有其他参数更改为数字，结果成功了，但我希望用户输入数字，而不是在程序中键入数字。别担心数学问题。我有我将要添加的所有代码。我只需要帮助56号线开始工作

from turtle import *
canvas = Screen()
canvas.setup(400,200)

class Triangle(object):
    """Triangle"""
    sides = 3
    def __init__(self, angle1, angle2, angle3, length1, length2, length3):
        self.angle1 = angle1
        self.angle2 = angle2
        self.angle3 = angle3
        self.length1 = length1
        self.length2 = length2
        self.length3 = length3

    print "Enter the following inputs"
    angle1 = raw_input("Please enter Angle 1: ")
    print angle1
    angle2 = raw_input("Please enter Angle 2: ")
    print angle2
    angle3 = raw_input("Please enter Angle 3: ")
    print angle3
    length1 = raw_input("Please enter Length 1: ")
    print length1
    length2 = raw_input("Please enter Length 2: ")
    print length2
    length3 = raw_input("Please enter Length 3: ")
    print length3

    def description(self):
        print angle1
        print angle2
        print angle3
        print length1
        print length2
        print length3
        self.degrees()

    def check_Angles(self):
        "Lets Make sure the angles add up to 180"
        if self.angle1 + self.angle2 + self.angle3 == 180:
            print "That is a good Triangle"
            return True 
        else:
            print "That is not a good Triangle"
            return False

    def draw(self):
        if self.check_Angles():
            pen = Turtle()
            pen.forward(self.length1)
            pen.left(self.angle1)
            pen.forward(self.length2)
            pen.left(self.angle2)
            pen.forward(self.length3)

triangle2 = Triangle(angle1, angle2, angle3, length1, length2, length3)

triangle2.draw() 

canvas.exitonclick()

---

以下代码的重新排列将使其运行，但不一定能正常工作。也就是说，它没有画出正确的三角形——但在现在运行的代码中，这是可以忽略的：

from turtle import *

canvas = Screen()
canvas.setup(400, 200)

class Triangle(object):
    """Triangle Class"""

    def __init__(self, angle1, angle2, angle3, length1, length2, length3):
        self.angle1 = angle1
        self.angle2 = angle2
        self.angle3 = angle3
        self.length1 = length1
        self.length2 = length2
        self.length3 = length3

    def description(self):
        print angle1
        print angle2
        print angle3
        print length1
        print length2
        print length3

    def check_Angles(self):
        """Lets Make sure the angles add up to 180"""

        if self.angle1 + self.angle2 + self.angle3 == 180:
            print "That is a good Triangle"
            return True 
        else:
            print "That is not a good Triangle"
            return False

    def draw(self):
        if self.check_Angles():
            pen = Turtle()
            pen.forward(self.length1)
            pen.left(self.angle1)
            pen.forward(self.length2)
            pen.left(self.angle2)
            pen.forward(self.length3)

print "Enter the following values:"

angle1 = int(raw_input("Please enter Angle 1: "))
angle2 = int(raw_input("Please enter Angle 2: "))
angle3 = int(raw_input("Please enter Angle 3: "))

length1 = int(raw_input("Please enter Length 1: "))
length2 = int(raw_input("Please enter Length 2: "))
length3 = int(raw_input("Please enter Length 3: "))

triangle = Triangle(angle1, angle2, angle3, length1, length2, length3)

triangle.draw() 

canvas.exitonclick()

---

啊。非常感谢你。我所需要的只是输入。现在我可以把数学计算放进去，让它变成一个三角形。谢谢。