Data Science in Python, Volume 2: Data IO, Jupyter Notebook, GUI, Deployment, Numeric Programming, High Performance Python by Alexander Stepanov

Author:Alexander Stepanov [Stepanov, Alexander]
Language: eng
Format: azw3
Published: 2016-04-25T04:00:00+00:00

import tkinter as tk

root = tk.Tk()

def slider_response(n):

fields=text.get().split()

text.set(fields[0]+' '+str(n))

text=tk.StringVar(root, "Clicks: 0")

tk.Label(root, textvariable=text).grid(column=0, row=0)

my_slider=tk.Scale(root, from_=0, to=100,

orient=tk.HORIZONTAL, command=slider_response)

my_slider.grid(column=0,row=1)

root.mainloop()

Entry and Text widgets

Entryand Text widgets allow the user to enter text. Entryallows a single line of text whereasTextallows multiline text. Unlike slider, these widgets don't havecommandparameters, but you can connectStringVarto these widgets using thetextvarconstructor parameter. Then, the callback function can be attached to thisStringVar to call a function when user types in the widget window.

Text entered by the user can be obtained by theget() method of Entry or the Text widget. To use this, you need to keep a reference to the widget returned by the constructor.

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