simple dialog in tkinter // Taking input through dialog boxes

Tkinter : Simpledialog Widget

Let you want to get some input from user then you use tkinter Entry widget , but if you want to take user input through a popup window then you have to use Top level class and the in it creates widgets like Entry , Button also set the geometry and other things .

So instead of using all these things you can just import a tkinter dialog widget simpledialog .

simpledialog is a standard dialog widget of tkinter like message box and file dialog .

Methods of simpledialog :

simple dialog have only 3 methods 

1. askstring(title, prompt) :

For string type inputs

2. askinteger(title, prompt) :

For integer type inputs

3. askfloat(title, prompt) :

For floating type inputs

 So now lets code :

from tkinter import *
from tkinter import simpledialog

def func():
	data = simpledialog.askstring('Python says','Enter your Name')
	print(data)
	print(type(data))

root = Tk()
root.title('Dynamic Coding')

btn = Button(root,text='Press Here',command=func)
btn.pack(pady = 10) 

root.mainloop()

 OUTPUT :

As you can see wheni click on the function a small window pop-up's with a title " Python says " and message "Enter your name ".

And if i write my name and press ok then the value is printed according to the code written .

but if i pass a integer or a float number in it then what will happen .

so when you try this then you will get that output .

1. when string is passed

#Yogesh

#<class 'str'>

2 .when integer is passed

#1234

#<class 'str'>

3. when a float is passed

#12.4

#<class 'str'>

But if i try to pass a string in askinteger method then what will happen .

So now lets code :

from tkinter import *
from tkinter import simpledialog

def func():
	data = simpledialog.askstring('Python says','Enter your Age')
	print(data)
	print(type(data))

root = Tk()
root.title('Dynamic Coding')

btn = Button(root,text='Press Here',command=func)
btn.pack(pady = 10) 

root.mainloop()

 OUTPUT :

As you can see when i passed a string in ask integer method of simpledialog then a error message box pop-up's with a error message "Not an integer Please try again" and this error comes also when we try to pass float values to it .

The returned value is  :

#None

#<class 'NoneType'>

The none value is also returned when we press cancel button of  simpledialog .

Other tkinter related posts are :

 

Combo box in tkinter 

Introduction to tkinter

Text widget in tkinter

Binding Mouse and keyboard in tkinter 

This blog is contributed by Yogesh singh .

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