python - 我需要 fillcolor 来读取 Python 中的值

Question

我正在设置两个定义，我希望 fillColor 从 drawBar 中读取。程序未读取与该值对应的正确颜色。

import turtle

wn = turtle.Screen()             # Set up the window
wn.bgcolor("white")

tess = turtle.Turtle()  
tess.penup()
tess.goto(-100,-75)
tess.pendown()


def drawBar(t, height):
    """ Get turtle t to draw one bar, of height. """
    t.left(90) 
    t.begin_fill()# Point up
    t.forward(height)
    # Draw up the left side
    t.right(90)
    t.forward(40)            # width of bar, along the top
    t.right(90)
    t.forward(height) 
    t.end_fill()# And down again!
    t.left(90)   

def drawColor(t, height):
    drawBar(t, height)
    if height >= 200:
         return tess.fillcolor("red")
    elif height  < 200 and v >= 100:
         return tess.fillcolor("yellow")
    elif height < 100: 
         return tess.fillcolor("green")

xs = [48, 117, 200, 240, 160, 260, 220]

for v in xs:                 # assume xs and tess are ready
    drawColor(tess, v) 

我不知道为什么这不起作用。

Answer 1

我认为您在提到 height 测试时可能有错别字:

elif height  < 200 and v >= 100:
     return tess.fillcolor("yellow")

应该是:

elif 100 <= height < 200:
     return tess.fillcolor("yellow")

v 可能在全局范围内找到，而不是您想要测试的内容。

此外，您传递了对 turtle 对象的引用，但您没有使用它:

def drawColor(t, height):
    drawBar(t, height)
    if height >= 200:
         # return tess.fillcolor("red")
         return t.fillcolor("red")
    ...