Graphical Clock Application with Python

I work on a openbox window manager environment and I wanted to have a window which show me current time (in order to avoid extra hours) on my screen. So I developed a small python program to get it.

Configuration

• OS : Arch Linux
• python : 3.7.2
• tk : 8.6.9-2

Instructions

• We need to install tk windowing toolkit :

root@host:~# pacman -S extra/tk

Code

#! /usr/bin/python

# Role : Graphical Window to show current time
# Author : http://shebangthedolphins.net/
# 1.0 first version

#links that helped me : 
# - https://tkdocs.com/tutorial/firstexample.html
# - https://stackoverflow.com/questions/44085554/how-to-use-the-after-method-to-make-a-callback-run-periodically
# - https://stackoverflow.com/questions/46279096/tkinter-update-variable-real-time
# - https://sebsauvage.net/python/gui/

#from tkinter import *
from tkinter import ttk
import datetime
import tkinter as tk

class WhatTime(tk.Tk):
        def __init__(self,parent):
                tk.Tk.__init__(self,parent)
                self.parent = parent
                self.initialize()

        def initialize(self):
                try:
                        self.grid()
                        self.resizable(False,False) #I don't want that the window can be resized
                        self.hour = tk.StringVar() #Set hour variable
			self.wm_attributes("-topmost", 1)  #Put window on top of others
                        self.PrintTime()
                        label = tk.Label(self,textvariable=self.hour,anchor="w",fg="green",bg="black") #set graphical theme
                        label.config(font=("Courier", 20, "bold")) #set font
                        label.grid(column=0,row=0,columnspan=1,sticky='EW')

                except ValueError:
                        pass

        def PrintTime(self):
                try:
                        value = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S') #set the time output
                        self.hour.set(value)
                        self.after(1000, self.PrintTime) #will be refreshed each second

                except ValueError:
                        pass

if __name__ == "__main__":
        app = WhatTime(None)
        app.title('WT2I?')
        app.mainloop()

Picture

• Download : wt2i.py