Program 30

                                                                        Program 30

Write a Python class to implement pow(x, n).

class Pow1:

    def poe(self,x,n):

        k=x**n

        print("pow({},{})={}".format(x,n,k))

p=Pow1()

x=int(input("Enter the X value:"))

n=int(input("Enter the Y value:"))

p.poe(x,n)

OUTPUT:

===== RESTART: C:/Users/crrcse/Desktop/29.py =======

Enter the X value:3

Enter the Y value:4

pow(3,4)=81

>>> 

Program 31

                                                                            Program 31

Write a Python class to reverse a string word by word.

class Sa:

    def display(self,s):

        words = s.split(' ')  

        reverse_sentence = ' '.join(reversed(words))  

        print("The reverse words of string:",reverse_sentence) 

  

k=Sa()

s = input("enter the string:")

k.display(s)

OUTPUT:

=== RESTART: C:/Users/crrcse/Desktop/30.py =======

enter the string:welcome to python 

The reverse words of string:  python to welcome

>>> 

                                                                       Program 32

Write a program that opens a file dialog that allows you to select a text file. The program then displays the contents of the file in a textbox.

Program 33

                                                                           Program 33
Write a program to demonstrate Try/except/else.

try: 
   a=int(input("enter the A value:"))
   b=int(input("enter the B value:"))
   s=a/b
except ZeroDivisionError:    
    print("Can't divide by zero(b=0)")
else:
    print("The division is=",s) 

OUTPUT:

1.==== RESTART: C:/Users/crrcse/Desktop/36.py =======

enter the A value:27

enter the B value:3

The division is= 9.0

>>> 

2.==== RESTART: C:/Users/crrcse/Desktop/36.py =======

enter the A value:70

enter the B value:0

Can't divide by zero(b=0)

>>> 

Program 34

                                                                    Program 34
 Write a program to demonstrate try/finally and with/as.

try: 
   a=int(input("enter the A value:"))
   b=int(input("enter the B value:"))
   s=a/b
except ZeroDivisionError:    
    print("Can't divide by zero(b=0)")
else:
    print("The divsion is=",s) 
finally: 
    print('This is always executed') 

OUTPUT:

1.=== RESTART: C:/Users/crrcse/Desktop/36.py =====

enter the A value:20

enter the B value:0

Can't divide by zero(b=0)

This is always executed

>>> 

2.===== RESTART: C:/Users/crrcse/Desktop/36.py =======

enter the A value:20

enter the B value:2

The divsion is= 10.0

This is always executed

>>> 

with/as.

file=open('satya.txt','w')
try:
    file.write('welcome to python')
finally:
    file.close()
with open('satya2.txt','w')as file:
    file.write('welcome to python')

OUTPUT: