Python 嵌套def不工作

我需要向第二个def语句添加什么才能使其工作

def main():
    # the user has to choose a picture and then he is asked to
    pic = makePicture(pickAFile())

    # the user is asked to select a color that he wants to remove from a picture
    color = requestString("Which color would you like to remove?")
    show(pic)

    # whats wrong with this last part that doesn't make the modifications to the picture
    def RemoveColor(pic, color):
        r = red
        g = green
        b = blue
        for px in getPixels(pic):
            setRed(px, 0)

        for px in getPixels(pic):
            setGreen(px, 0)

        for px in getPixels(pic):
            setBlue(px, 0)

    repaint(pic)

---

这里，我从

main

函数中取出

RemoveColor

函数，并从

main

def RemoveColor(pic, color):
    r = red
    g = green
    b = blue
    for px in getPixels(pic):
        setRed(px, 0)

    for px in getPixels(pic):
        setGreen(px, 0)

    for px in getPixels(pic):
        setBlue(px, 0)

def main():
    # the user has to choose a picture and then he is asked to
    pic = makePicture(pickAFile())

    # the user is asked to select a color that he wants to remove from a picture
    color = requestString("Which color would you like to remove?")
    show(pic)

    RemoveColor(pic, color) # HERE I'M CALLING RemoveColor
    repaint(pic)

---

为了让任何人都能帮助你，你需要描述你的具体问题。此代码段引用了许多未定义的函数。请注意，您可能需要阅读《Python样式指南》。您定义了removeColor，但从未调用该函数。@furins。。谢谢你的来信。我还有一个问题。为什么RemoveColor（pic，color）不工作，程序会执行“for”语句，但它会删除所有颜色并重新绘制为黑色。我如何让它只删除所请求的颜色？@EsJe请告诉我您使用的是哪个库，我将尝试回答。。。什么库/模块定义了

getPixel

？@fusins我不明白模块或库是什么意思，因为我是编程新手。你认为你可以更具体一点吗？在你给我们看的代码之前，你是否写过“导入[某些模块]”？你可以发布你的全部代码吗？但是，这是与“嵌套定义”问题无关的第二个问题：您应该在stackoverflow中开始一个新问题，以便第一眼就得到社区的帮助，但是，我发现在removecolor函数中，您从未检查for循环中的像素是否具有所需的颜色，您只需替换所有像素，而根本不使用颜色属性。