蛇动画

Question

我在编码课上有作业，不知道怎么做。我应该做一个动画，在一种蛇型动画中照亮正方形（它从左上角的正方形开始，继续到右上角，然后转到第二行，但不是从右边开始，而是从左边开始）。我该怎么做？请帮帮我，我不懂。下面是我到目前为止得到的代码

import tkinter as tk
import random


master = tk.Tk()
rectangle_list = []
canvas_width = 280
canvas_height = 250
w = tk.Canvas(master, width=canvas_width, height=canvas_height)
w.pack()
input1 = tk.Entry (master)
w.create_window(100, 40, window=input1)

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 0, 25, 25, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 0, x, 25, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 25, 25, 50, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 25, x, 50, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 50, 25, 75, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 50, x, 75, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 75, 25, 100, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 75, x, 100, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 100, 25, 125, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 100, x, 125, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 125, 25, 150, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 125, x, 150, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 150, 25, 175, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 150, x, 175, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 175, 25, 200, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 175, x, 200, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 200, 25, 225, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 200, x, 225, fill="grey"))

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 225, 25, 250, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 225, x, 250, fill="grey"))

# manage color change loop based on index of rectangle list
def uno(ndex=0):
    if ndex < len(rectangle_list):
        w.itemconfig(rectangle_list[ndex], fill='red')
        master.after(100, uno, ndex+1)


def dos(ndex=0):
    if ndex < len(rectangle_list):
        w.itemconfig(rectangle_list[ndex], fill='grey')
        master.after(0, dos, ndex+1)

def tres(ndex=0):
    if ndex < len(rectangle_list):
        w.itemconfig(rectangle_list[ndex], fill='red')
        master.after(100, tres, ndex-1)

def quatros(ndex=0):
    if ndex < len(rectangle_list):
       w.itemconfig(rectangle_list[ndex], fill='red')
       master.after(100, tres, ndex-6)
    if ndex < len(rectangle_list):
        w.itemconfig(rectangle_list[ndex], fill='red')
        master.after(100, uno, ndex+6)

def cinq(ndex=0):
    if ndex < len(rectangle_list):
       w.itemconfig(rectangle_list[ndex], fill='red')
       master.after(100, tres, ndex-1)
    if ndex < len(rectangle_list):
        w.itemconfig(rectangle_list[ndex], fill='red')
        master.after(100, uno, ndex+1)

def six(ndex=0):
    while True:
        if ndex == len(rectangle_list):
            w.itemconfig(rectangle_list[ndex], fill='red')
            master.after(10, six, ndex+random.choice(rectangle_list))

def seven(ndex=0):
    if ndex < len(rectangle_list):
        w.itemconfig(rectangle_list[ndex], fill='red')
        master.after(100, seven, ndex+3)

tk.Button(master, text="animacia", command=uno).pack(side='left', padx=10)
tk.Button(master, text="zhasni", command=dos).pack(side='left', padx=10)
tk.Button(master, text="animacia 2", command=tres).pack(side='left', padx=10)
tk.Button(master, text="animacia 3", command=quatros).pack(side='left', padx=10)
tk.Button(master, text="animacia 4", command=cinq).pack(side='left', padx=10)
tk.Button(master, text="animacia 5", command=six).pack(side='left', padx=10)
tk.Button(master, text="animacia 6", command=seven).pack(side='left', padx=10)
master.mainloop()

Answer 1

最简单的方法是用range(11)和range(10,0,-1)替换range函数：

for i in range(11):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 0, 25, 25, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 0, x, 25, fill="grey"))

for i in range(10,0,-1):
    x = i * 25
    if i == 1:
        rectangle_list.append(w.create_rectangle(0, 25, 25, 50, fill="grey"))
    else:
        rectangle_list.append(w.create_rectangle(x-25, 25, x, 50, fill="grey"))

...

但是您应该真正考虑最小化多个for循环中的重复代码