我必须用类点来画一个Sierpinski三角形，但是当我试图运行这个程序时，它不允许我绘制三角形。我们必须有一个输入函数，用于计算大三角形的三条边的长度(L)和迭代次数(I)。请帮助！这是我所拥有的。在import turtle
class point:
def __init__(self, x, y):
self.x = x
self.y = y
def midpoint(self, p2):
return point((self.x + p2.x) / 2, (self.y + p2.y) / 2)
def DrawSierpinskiTriangle(length, iterations):
turn = 0
angle = 60
# Initialize the turtle
turtle.hideturtle()
turle.penup()
turtle.degrees()
# Starting point on the cancas
midpoint = ((self.x + p2.x) / 2, (self.y + p2.y) / 2)
decode = {'-':Left, '+':Right, 'X':Forward, 'H':Forward}
code = 'H--X--X'
# Start the drawing
turtle.goto(point[0], point[1])
turtle.pendown()
turtle.hideturtle()
turt=turtle.getpen()
startposition=turt.clone()
# Get triangle
path = code
length = x
for i in range(0,length):
path = path.replace('X','XX')
path = path.replace('H','H--X++H++X--H')
for i in path:
[turn, point, fwd, angle, turt]=decode[i](turn, point, fwd, angle, turt)
def main():
input("Enter the length of the triangle: ")
input("Enter the number of iterations: ")
main()
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