python-3.x - 条目不显示

Question

    from tkinter import *


class calc:
    def mult(a,b):
        global result  #Declaration must take place in each function. Else its local
        result = a*b
    def div(a,b):
        global result  #Declaration must take place in each function. Else its local
        result=a*b
    def add(a,b):
        global result  #Declaration must take place in each function. Else its local
        result = a*b
    def sub(a,b):
        global result  #Declaration must take place in each function. Else its local
        result = a*b
#calc.mult(10,5)
#print(result)

window = Tk()
window.title('Calculator')
window.geometry("300x200")
textBox=Entry(window)

mainloop()
formula = textBox.get()
print(formula)

我似乎无法显示条目。它确实可以在我的另一台计算机上运行，​​但由于某些原因不在这里，除非我再次更改某些内容。

你们能帮忙吗？

标签： python-3.xtkinter

Answer 1

要显示小部件，您必须在该小部件上调用pack、place或grid，或将其插入到另一个小部件中，例如画布、文本小部件、笔记本等。您不会在条目小部件上调用任何这些方法。