Python，Tkinter，如何基于buttonclick更改GUI
我在编程作业中使用 Tkinter 并遇到以下问题。 我希望用户在文本框中输入值，并且当他/她单击提交按钮时，我想根据在文本框中输入的数字在 GUI 上添加其他字段。
我尝试将代码放在函数“displayText()”中，按下提交按钮时会调用该函数；但是，我放置在其中的 GUI 相关代码是在加载窗口时加载的。
import tkinter
#When user clicks on button
def displayText():
#DO CHANGE IN GUI
root = tkinter.Tk()
button = tkinter.Button(root, text="Submit", command=displayText())
button.pack()
root.mainloop()
I am using Tkinter in a programming assignment and have the following problem.
I want the user to enter the value in a textbox, and I want to add additional fields on the GUI based on the number entered in the textbox when he/she clicks the submit-button.
I tried to place code inside of the function 'displayText()', which is called when the submit-button is pressed; however, the GUI-related code that I placed inside of it was loaded when the window was loaded.
import tkinter
#When user clicks on button
def displayText():
#DO CHANGE IN GUI
root = tkinter.Tk()
button = tkinter.Button(root, text="Submit", command=displayText())
button.pack()
root.mainloop()
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问题出在这行代码中：
command选项采用命令的引用。相反，您所做的是调用命令 (displayText()) 并将该命令的结果提供给选项。您需要删除()以便实际运行的命令与该选项相关联，如下所示：The problem is in this line of code:
The
commandoption takes a reference to a command. What you are doing instead is calling a command (displayText()) and giving the results of that command to the option. You need to remove the()so that the actual command to run is associated with the option, like so: