Types Of Exceptions In Python

Introduction

 

In this article, I will explain the types of exceptions in Python.

1. Try
2. Except
3. Finally

The try block is used to check a block of code for errors. The except block is used to take care of the error. The finally block is used to execute code, irrespective of the result of the try and except blocks.

 

Exception handling

 

When an error occurs, or exception as we call it, Python will generally stop and generate a mistake message. The exception is handled using the try statement.

 

Syntax

try:
   //statement
except:
   //statement

 Program

a=10
try:
  b=a/0 #error occurs.
  print(b)
except:
  print ("10 was not divided by 0")

Output

 

The try block will generate an error because 10 was not divided by 0. The try block is an error so, the except block will be executed. Without the try block, the program will show the error in the output screen. So, we use try blocks.

 

 

Many exceptions

 

In Python, one or more exceptions are used in the except.

 

Syntax

try:
     //statement
except:
     //statement
except:
     //statement

Program

try:
    a=int (input ("enter value\t=")) #user input
    b=10/a
    print (b)
except ZeroDivisionError:
    print ("ZeroDivisionError")
except: #other errors
    print ("something went wrong")

Output

 

When a Zero Error occurs, it executes the “except ZeroDivisionError” block and another for other errors.

 

 

else

 

The statement itself says that if a given condition is true or false. True means executing the “try” block to the output. False means executing the “else” block to the output.

 

Syntax

try:
     //statement
except:
     //statement
else:
     //statement

Program

try:#try and except both are error.
  x=3
except:
  print("x value is 3")
else:# try block does not raise any errors because the else block is executed.
  print("Something went wrong")

Output

 

The try block does not raise any errors because the else block is executed.

 

 

Finally

 

The finally block is used to execute code, irrespective of the result of the try and except blocks. The finally block will be executed one time in the output screen.

 

Syntax

try:
     //statement
except:
     //statement
finally:
     //statement

Program

a=10
try:
  print(a)
except:
  print("Something went wrong")
finally:
  print("hello c# corner")

Output

 

Try and finally blocks are executed in the output screen.

 

 

Raise

 

Raise exceptions in several ways by using the raise statement.

 

Syntax 

raise (Exception(args(traceback)))

Program

a = 1000#a value is above 100
if 100 < a:
  raise Exception("Sorry, the numbers above 100")

Output

 

Raise is checking if a condition occurs or not.

 

 

Conclusion

 

In this article, we have seen types of exceptions in Python. I hope this article was useful to you. Thanks for reading!