PNG将不会在弹出窗口Tkinter中显示

debugcn 发表于 Dev

Zayn贾斯汀

尽管img的变量是全局变量，但我的PNG文件不会显示在弹出窗口中。

global img

def Malwind():
    maltop = Toplevel()
    maltop.iconbitmap('icon.ico')
    maltop.title("Expert Systems Diagnosis Results")
    mgt1 = Label(maltop, text="The breast lump is diagnosed to be: Malignant").grid(row=5, column=2)
    mgt2 = Label(maltop, text="The following symptoms could be observed").grid(row=6, column=2)
    mgt3 = Label(maltop, text="Skin irritation\nPain or tenderness of the nipple\nBloody nipple discharge").grid(row=7, column=2)
    canvas = Canvas(maltop, width = 200, height = 200)
    canvas.grid(row = 1, column = 2)
    img = ImageTk.PhotoImage(Image.open("soft.png"))
    canvas.create_image(0, 0, anchor = NW, image = img)

小鸭

所述Global关键字被认为是一个函数内，并允许在函数的函数中的全局范围修改变量的值。这意味着您必须global img进入该函数，并确保此变量已存在于全局范围中。这是更正的代码：

def Malwind():
    global img
    maltop = Toplevel()
    maltop.iconbitmap('icon.ico')
    maltop.title("Expert Systems Diagnosis Results")
    mgt1 = Label(maltop, text="The breast lump is diagnosed to be: Malignant").grid(row=5, column=2)
    mgt2 = Label(maltop, text="The following symptoms could be observed").grid(row=6, column=2)
    mgt3 = Label(maltop, text="Skin irritation\nPain or tenderness of the nipple\nBloody nipple discharge").grid(row=7, column=2)
    canvas = Canvas(maltop, width = 200, height = 200)
    canvas.grid(row = 1, column = 2)
    img = ImageTk.PhotoImage(Image.open("soft.png"))
    canvas.create_image(0, 0, anchor = NW, image = img)

本文收集自互联网，转载请注明来源。

如有侵权，请联系[email protected] 删除。