使用 Python 绘制带有海龟引用列表或字典的正弦波

Question

我试图从字典中提取字符串，并想在波函数中遍历它们。乌龟应该用 x 和 y 的值产生一个正弦波。我也尝试了一个列表，但那没有用。也许这是不可能的，我正在解决这个问题。

import turtle, math

def createTurtle(count):
    for x in range(count):
        turtle_dict[x] = turtle.Turtle()
        turtle_dict[x].shape("turtle")
        turtle_dict[x].color(color_list[x])
        turtle_dict[x].width(3)
        return turtle_dict[x]

def wave(count):
    for n in range(count):
        amp = amp_list[n]
        freq = freq_list[n]
        createTurtle(n)
        for x in range(361):
            y_val = amp * math.sin(math.radians(x * freq))
            turtle_dict.values().goto(x, y_val)
            print(x, y_val)

num_waves = int(input("How many sine waves do you want to create? "))
amp_list = []
freq_list = []
turtle_dict = {1 : "alpha", 2 : "beta", 3 : "gamma", 4 : "delta", 5 : "omega"}
color_list = ["red", "blue", "green", "purple", "pink"]
counter = 1

for x in range(num_waves):
    print("\nSine Wave #" , counter)
    amp = int(input("Enter the amplitude of the sine wave: "))
    freq = float(input("Enter the frequency of the sine wave: "))
    amp_list.append(amp)
    freq_list.append(freq)
    counter += 1

print(amp_list)
print(freq_list)
print(turtle_dict)

amp_screen = max(amp_list) + 1

win = turtle.Screen()
win.bgcolor("lightyellow")
win.setworldcoordinates(0,-amp_screen, 500 ,amp_screen)

wave(counter-1)

win.exitonclick()

Answer 1

我的分析是你可以用一个列表来做到这一点——你不需要字典——它不起作用的原因是你的代码有很多错误。例如，createTurtle() 有一个缩进错误，导致它过早地变成 return。并且在其调用不正确的地方，传递的是循环计数器而不是循环范围。 turtle_dict 未正确使用，在海龟列表 (.values()) 上调用 goto() 而不是单个海龟。

这是我修复发现的问题并调整代码风格的返工：

import math
from turtle import Turtle, Screen
from itertools import cycle

color_list = ['red', 'blue', 'green', 'purple', 'pink']

def createTurtles(count):
    turtles = []
    colors = cycle(color_list)

    for _ in range(count):
        turtle = Turtle('turtle')
        turtle.color(next(colors))
        turtle.speed('fastest')
        turtle.width(3)

        turtles.append(turtle)

    return turtles

def wave(count):
    for n in range(count):
        amp = amp_list[n]
        freq = freq_list[n]
        turtle = turtles_list[n]
        turtle.penup()

        for x in range(361):
            y_val = amp * math.sin(math.radians(x * freq))
            turtle.goto(x, y_val)
            turtle.pendown()

num_waves = int(input('How many sine waves do you want to create? '))

amp_list = []
freq_list = []
counter = 1

for x in range(num_waves):
    print('\nSine Wave #', counter)
    amp = int(input('Enter the amplitude of the sine wave: '))
    freq = float(input('Enter the frequency of the sine wave: '))
    amp_list.append(amp)
    freq_list.append(freq)
    counter += 1

amp_screen = max(amp_list) + 1

screen = Screen()
screen.bgcolor('lightyellow')
screen.setworldcoordinates(0, -amp_screen, 400, amp_screen)

turtles_list = createTurtles(num_waves)

wave(counter - 1)

screen.exitonclick()

使用 Python 绘制带有海龟引用列表或字典的正弦波

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