由于canvas.move，Tkinter创建新行不与上一行合并

Question

我正在尝试创建一个可以使用Tkinter绘制带有动画的分形的程序，但是当我尝试对绘制过程进行动画处理时，出现了一个问题，该问题导致绘制的每条新线均与上一条不相交。这是代码

from tkinter import *
import math
import sys

sys.setrecursionlimit(10000)


class Curlicue:
    def __init__(self, contstant, iterations):
       self.root = Tk()
       self.c = contstant
       self.maxiter = iterations
       self.root = Tk()
       self.w = self.root.winfo_screenwidth()
       self.h = self.root.winfo_screenheight()
       self.canvas = Canvas(self.root, width=self.w, height=self.h)
       self.canvas.pack()

    def curli(self, iters):
        c = self.c
        # z=(z+2*math.pi*(i+1)*self.c)%(2*math.pi)
        if iters == 0:
           return 0
        elif iters == 1:
           return (4 * math.pi * c) % (2 * math.pi)
        else:
           return (self.curli(iters - 1) + 2 * math.pi * (iters + 1) * c) % (2 * math.pi)

    def create_line(self):
        rad = self.curli(0)
        line_length = 10
        center_x = 0
        center_y = 600
        end_x = center_x + line_length * math.cos(rad)
        end_y = center_y + line_length * math.sin(rad)
        self.canvas.create_line(center_x, center_y, end_x, end_y, fill='black', activewidth=10)
        for i in range(1, self.maxiter):
            next_x = end_x
            next_y = end_y
            end_x = next_x + line_length * math.cos(rad)
            end_y = next_y + line_length * math.sin(rad)
            dis_x = abs(end_x - next_x)
            dis_y = abs(end_y - next_y)
            new_line = self.canvas.create_line(next_x, next_y, end_x, end_y, fill='black', activewidth=10)
            self.canvas.move(new_line, dis_x, dis_y)
            self.canvas.update()
            rad = self.curli(i)
        self.canvas.pack()
        mainloop()


c = Curlicue(math.pi, 100)
c.create_line()

如果我删除了self.canvas.move函数，则线条会完美地相互连接，但是看不到动画。