基于get()方法的Tkinter问卷

时间:2017-10-02 21:12:02

标签: python

我正在尝试根据2个问题的答案制作我的第一个GUI脚本。我将展示非GUI脚本的示例

while True:
    ammount = input("What is your debt")
    if ammount.isdigit() == True:
        break
    else:
        print("Please try typing in a number")

while True:
    month = input("In which month did the debt originate?")
    if month not in ["January", "February"]:
        print("Try again")
    else:
        break

这个脚本的重点在于它可以扩展,可以添加所有问题,我想在Tkinter中以相同的方式理解它。我会展示我尝试过的东西:

from tkinter import *

def click():
        while True:
                entered_text = text_entry.get()
                if entered_text .isdigit() == False:
                        error = Label(window, text="Try again", bg = "black", fg="red", font="none 11").grid(row = 3, column = 2, sticky= W).pack()
                else:
                        break
        return True


window = Tk()

window.title("Tax calculator")
window.configure(background="black")


monto = Label(window, text="¿What is your debt?", bg="black", fg="white", font="none 12 bold")
monto.grid(row = 1, column = 0, sticky= W)

text_entry = Entry(window, width = 20, bg="white")
text_entry.grid(row = 2, column=2, sticky=W)

output = Button(window, text = "Enter", width = 6, command = click)
output.grid(row = 3, column = 0,  sticky = W)

问题是,我无法在click()方法的if / else中添加Label()方法,因为一旦条件满足,我想问一个新问题。一旦满足条件,我也无法从单击中获取True,因为输入来自Button()方法。提前致谢

1 个答案:

答案 0 :(得分:0)

这里你实际上并不需要任何循环,一个简单的if语句足以完成这个技巧。此外,无需每次都重新创建标签,您只需configure()其文本即可。并且,请注意索引从0开始 - 所以,在你的网格中,实际的第一行(和列)需要编号为0,而不是1.除此之外,我建议你摆脱import *,因为你不要知道进口的名称。它可以替换您之前导入的名称,这使得很难看到程序中的名称应该来自哪里。您可能还想阅读PEP8 says about spaces around keyword arguments

import tkinter as tk

def click():
    entered_text = text_entry.get()

    if not entered_text.isdigit():
        status_label.configure(text='Please try again')
        text_entry.delete(0, tk.END)
    else:
        status_label.configure(text='Your tax is ' + entered_text)
        text_entry.delete(0, tk.END)

root = tk.Tk()
root.title('Tax calculator')
root.configure(background='black')

monto = tk.Label(root, text='¿What is your debt?', bg='black', fg='white', font='none 12 bold')
monto.grid(row=0, column=0, padx=10, pady=(10,0))

text_entry = tk.Entry(root, width=20, bg='white')
text_entry.grid(row=1, column=0, pady=(10,0))

status_label = tk.Label(root, text='', bg='black', fg='red', font='none 11')
status_label.grid(row=2, column=0)

button = tk.Button(root, text='Enter', width=17, command=click)
button.grid(row=3, column=0, pady=(0,7))

root.mainloop()

我忘了提一下,如果你的应用程序越来越大,你最好不要上课。