Tkinter Button exercise solutions

#increase and decrease button size
import tkinter as tk
my_w=tk.Tk()
my_w.geometry('500x500')

def my_fun(todo):
    w=b2.cget('width')
    if(todo=='increase'):
       w=w+5
    else:
       w=w-5
    b2.config(width=w)
    
b1=tk.Button(my_w,text='+',width=20,bg='yellow',command=lambda: my_fun('increase'))
b1.grid(row=1,column=1)
b2=tk.Button(my_w,text='Close',width=10,bg='Green',command=my_w.destroy)
b2.grid(row=1,column=3)
b3=tk.Button(my_w,text='-',width=20,bg='yellow',command=lambda: my_fun('decrease'))
b3.grid(row=2,column=1)
my_w.mainloop()

#change the Colour of a button 
import tkinter as tk
my_w = tk.Tk()
my_w.geometry("600x200")  

def my_upd(c_type):
    b_c.config(bg=c_type)
    
b_c=tk.Button(my_w,text='Close',width=10,command=my_w.destroy)
b_c.grid(row=1,column=2)    
    
b1 = tk.Button(my_w, text='Yellow', width=10,bg='yellow',command=lambda: my_upd('yellow'))
b1.grid(row=1,column=1) 

b2 = tk.Button(my_w, text='Blue', width=10,bg='blue',command=lambda: my_upd('blue'))
b2.grid(row=2,column=1) 

b3 = tk.Button(my_w, text='Green', width=10,bg='green',command=lambda: my_upd('green'))
b3.grid(row=3,column=1) 

b4 = tk.Button(my_w, text='Red', width=10,bg='red',command=lambda: my_upd('red'))
b4.grid(row=4,column=1) 

my_w.mainloop()

#change the mouseover cursor style
import tkinter as tk
my_w = tk.Tk()
my_w.geometry("600x200")  

def my_upd(c_type):
    b6.config(cursor=c_type)
    
b1 = tk.Button(my_w, text='Circle', width=10,bg='yellow',command=lambda: my_upd('circle'))
b1.grid(row=1,column=1) 

b2 = tk.Button(my_w, text='Arrow', width=10,bg='blue',command=lambda: my_upd('arrow'))
b2.grid(row=2,column=1) 

b3 = tk.Button(my_w, text='sailboat', width=10,bg='green',command=lambda: my_upd('sailboat'))
b3.grid(row=3,column=1) 

b4 = tk.Button(my_w, text='hand1', width=10,bg='yellow',command=lambda: my_upd('hand1'))
b4.grid(row=4,column=1) 

b5 = tk.Button(my_w, text='hand2', width=10,bg='blue',command=lambda: my_upd('hand2'))
b5.grid(row=5,column=1) 

b6 = tk.Button(my_w, text='Close', width=10,bg='red',command=my_w.destroy)
b6.grid(row=1,column=2) 

my_w.mainloop()

import tkinter  as tk 
from datetime import date
my_w = tk.Tk()
my_w.geometry("350x300") # change width height 

def my_upd():
    dt=date.today().strftime('%U') # week number as string
    if(int(dt)%2==0):
        str1="Yes" # for even week number 
    else:
        str1="No"  # for odd week number
    l1.config(text=str1) # update the text on label 
b1=tk.Button(my_w,text='Click me',command=lambda:my_upd())
b1.grid(row=1,column=1,padx=60,pady=30)        
l1=tk.Label(my_w,text='Data')
l1.grid(row=1,column=2)
my_w.mainloop()