如何使用Python tkinter向用户询问整数输入

发布于 2025-02-02 11:21:14 字数 633 浏览 2 评论 0原文

我需要向用户询问整数值，然后尝试a = n.get（），然后a = int（a），但它不按预期工作。在这里，我使用的代码：

def selectparamter():
    window3= Tk()
    window3.title('choosing parameters ')
    window3.resizable(False,False)
    a_label = Label(window3, text = 'Select  parameter', font=('calibre',10, 'bold'))
    n = Entry(window3)
    string_answer = n.get()
    a= int(string_answer)
    sub_btn=Button(window3,text = 'Submit', command =nrmltest )
    sub_btn.grid(row=2,column=1)
    a_label.grid(row=0,column=0)
    n.grid(row=0,column=1)
    window3.mainloop()
    return a

如何从Python Tkinter中的用户获取正确的整数输入？

原文

I need to ask a user for an integer value and tried a=n.get() and then a=int(a) but it doesn't work as expected. Here the code I used:

def selectparamter():
    window3= Tk()
    window3.title('choosing parameters ')
    window3.resizable(False,False)
    a_label = Label(window3, text = 'Select  parameter', font=('calibre',10, 'bold'))
    n = Entry(window3)
    string_answer = n.get()
    a= int(string_answer)
    sub_btn=Button(window3,text = 'Submit', command =nrmltest )
    sub_btn.grid(row=2,column=1)
    a_label.grid(row=0,column=0)
    n.grid(row=0,column=1)
    window3.mainloop()
    return a

How can I get the right integer value input from user in Python tkinter?

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抱猫软卧 2025-02-09 11:21:14

def selectparamter():
    window3= Tk()
    window3.title('choosing parameters ')
    window3.resizable(False,False)
    a_label = Label(window3, text = 'Select  parameter', font=('calibre',10, 'bold'))
    n_var = IntVar()
    n = Entry(window3, textvariable=n_var)
    a = n_var.get()
    sub_btn=Button(window3,text = 'Submit', command =nrmltest )
    sub_btn.grid(row=2,column=1)
    a_label.grid(row=0,column=0)
    n.grid(row=0,column=1)
    window3.mainloop()
    return a

对于此代码，使用TKINTER类的INTVAR类来为小部件的“ textvariable”属性赋予价值。有关更多信息，在此处按。
这可以返回入口小部件的值为类的值，但是如果窗口小部件中的字符串给出，它将抛出异常。
“ a”的价值似乎是在小部件创建后立即称为的。因此，现在没有小部件中的文本，它将无法正常执行。

def selectparamter():
    window3= Tk()
    window3.title('choosing parameters ')
    window3.resizable(False,False)
    a_label = Label(window3, text = 'Select  parameter', font=('calibre',10, 'bold'))
    n_var = IntVar()
    n = Entry(window3, textvariable=n_var)
    a = n_var.get()
    sub_btn=Button(window3,text = 'Submit', command =nrmltest )
    sub_btn.grid(row=2,column=1)
    a_label.grid(row=0,column=0)
    n.grid(row=0,column=1)
    window3.mainloop()
    return a

For this code, IntVar class of tkinter was used to give value to "textvariable" attribute of widget. For more info, press here.
This can return the value of Entry widget as class but it will throw exception if string is given in the widget.
The value of 'a' seems to have been called right after widget creation. so, now with no text in widget, it will not perform properly.

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大海や 2025-02-09 11:21:14

在这里您是：

from tkinter import Tk, Label, Entry, Button, IntVar 
def selectparameter():
    def getValueFromUser():
        window3.quit()
    window3= Tk()
    window3.title('Choosing Parameters ')
    window3.resizable(False, False)
    a_label = Label(window3, text = 'Provide an integer value:  ', font=('calibre',10, 'bold'))
    n_var   = IntVar()
    n_var.set('')
    n = Entry(window3, textvariable = n_var)
    n.focus_set()
    sub_btn=Button(window3, text='Submit', command = getValueFromUser )
    sub_btn.grid(row=2,column=1)
    a_label.grid(row=0,column=0)
    n.grid(row=0,column=1)
    window3.mainloop()
    a = n_var.get()
    return a
print(selectparameter())

但是：tkinter带有一种更简单又更适合从用户获得整数输入的方法：askInteger。它检查用户输入，并再次询问用户输入一个非全能值：

from tkinter import Tk, simpledialog
root=Tk()
root.withdraw()
intUserInput = simpledialog.askinteger(title="askinteger", prompt="integerInputPlease")
root.destroy()
print(intUserInput)

Here you are:

from tkinter import Tk, Label, Entry, Button, IntVar 
def selectparameter():
    def getValueFromUser():
        window3.quit()
    window3= Tk()
    window3.title('Choosing Parameters ')
    window3.resizable(False, False)
    a_label = Label(window3, text = 'Provide an integer value:  ', font=('calibre',10, 'bold'))
    n_var   = IntVar()
    n_var.set('')
    n = Entry(window3, textvariable = n_var)
    n.focus_set()
    sub_btn=Button(window3, text='Submit', command = getValueFromUser )
    sub_btn.grid(row=2,column=1)
    a_label.grid(row=0,column=0)
    n.grid(row=0,column=1)
    window3.mainloop()
    a = n_var.get()
    return a
print(selectparameter())

But: tkinter comes with a method which is both simpler and also better suited to get an integer input from the user: askinteger. It checks the user input and asks the user again in case they input a non-integer value:

from tkinter import Tk, simpledialog
root=Tk()
root.withdraw()
intUserInput = simpledialog.askinteger(title="askinteger", prompt="integerInputPlease")
root.destroy()
print(intUserInput)

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