Question

我刚开始使用tkinter而且我遇到了一个问题，下面代码中的标签应该显示一个相当长的数字（0.7522488614550792）但不幸的是它没有，唯一可见的是一点点标签的框架（即使我放大窗口），代码没有给我任何错误，所以我不知道我做错了什么。感谢您的帮助

标签：

label = Label(root, textvariable=extentIndex, relief=RAISED)
label.pack()

整个代码：

 def select_image():
 global panelA, panelB, panelC
 path = filedialog.askopenfilename()

    [...]

    if panelA is None or panelB is None or panelC is None:
        # the first panel will store our original image
        panelA = Label(image=original)
        panelA.image = original
        panelA.pack(side="top", padx=10, pady=10)

        # while the second panel will store the edge map
        panelB = Label(image=binary)
        panelB.image = binary
        panelB.pack(side="right", padx=10, pady=10)

        panelC = Label(image=ROI)
        panelC.image = ROI
        panelC.pack(side="left", padx=10, pady=10)

        ###THIS IS THE LABEL###

        **label = Label(root, textvariable=extentIndex, relief=RAISED)
        label.pack()**

    # otherwise, update the image panels
    else:
        # update the pannels
        panelA.configure(image=original)
        panelB.configure(image=binary)
        panelC.configure(image=ROI)
        panelA.image = original
        panelB.image = binary
        panelC.image = ROI

# initialize the window toolkit along with the two image panels
root = Tk()
panelA = None
panelB = None
panelC = None

btn = Button(root, text="Select an image", command=select_image)
btn.pack(side="bottom", fill="both", expand="yes", padx="10", pady="10")

root.mainloop()

Answer 1

发现问题，一旦我将“textvariable”更改为“text”，它就开始工作了，所以来自：

label = Label(root, textvariable=extentIndex, relief=RAISED)

到

label = Label(root, text=extentIndex)

tutorialspoint可能有一个过时的公式

Tkinter不显示带数字的标签

1 个答案: