Py: 9. Python Exception Handling

 An exception can be defined as an unusual condition in a program resulting in the interruption in the flow of the program. Python provides a way to handle the exception so that the code can be executed without any interruption.

Problem:- 

a = int(input("Enter a:"))    

b = int(input("Enter b:"))    

c = a/b  

print("a/b = %d" %c)    

    

#other code:    

print("Hi I am other part of the program")  

Output:- 

Enter a:10

Enter b:0

Traceback (most recent call last):

  File "exception-test.py", line 3, in <module>

    c = a/b;

ZeroDivisionError: division by zero  

Solution:- 

try:  

    a = int(input("Enter a:"))    

    b = int(input("Enter b:"))    

    c = a/b  

except:  

    print("Can't divide with zero") 

#other code:    

print("Hi I am other part of the program")  

Output:-

Enter a:10

Enter b:0

Can't divide with zero   

Hi I am other part of the program

Common Exceptions:- 

Type Error

Type Error Exception is raised when two different or unrelated types of operands or objects are combined.

Name Error

A NameError is raised when you try to use a variable or a function name that is not valid.

Index Error

An IndexError is raised when a sequence reference is out of range.

Exercises:- 

1. Write a py program to demonstrate Type error.
2. Write a py program to demonstrate Name error.
3. Write a py program to demonstrate Index error.