Introduction

Today I will take a new part of python for my tutorial series. In this part, you will learn Exception Handling.
I already told you the following:
Python language has various types of Exception Handling. I will tell you some exception handling in Python and their examples.
Example of Exceptions:
  1. Num1=5
  2. Num2=0;
  3. print(Num1/Num2)
Output: ZeroDivisionError: division by zero,
output
  1. print(“10”+6)
Output: TypeError: Can't convert 'int' object to str implicitly.
output
  1. print(2+4*num)
Output: NameError: name 'num' is not defined.
output
  1. import math
  3. math.exp(10000)
Output: OverflowError: math range error,
output
  1. from foo import too
Output : ImportError: No module named 'foo'.
output
  1. array={'a':'1','b':'2'}
  3. array['c']
Output : KeyError: 'c'
output
  1. array = [1,2,3,4,5,6,7]
  3. array[10]
Output : IndexError: list index out of range.
output
So above all examples shows the exceptions in python programs with different-2 types.
So now I will tell you how to handle Exceptions
Example of Exception Handling:
try:
  1. num1=5
  2. num2=0
  3. print(num1/num2)
  4. except ZeroDivisionError:
  5. print("Divided By Zero")
Output : Divided by Zero
output
 try:
  1. print("10"+6)
  2. except TypeError:
  3. print("Error occured in \"10\"+6")
Output : Error occured in "10"+6
output
try:
  1. print(2+4*num)
  2. except NameError:
  3. print("num is not define")
Output : num is not define
output
So many exception handlings can handle the above Examples.
Raising Exceptions:
The raise statement forces an indication of specified Exception to occur.
try:
  1. num1=5
  2. num2=0
  3. print(num1/num2)
  4. except ZeroDivisionError:
  5. raise ZeroDivisionError("Error Occured")
Output : Shown in below image
output
So the above example, Shows a raise statement and prints the error forcibly in except module.
Finally :
In any exception occurred in code finally statement always runs after the execution of the code in the try block
try:
  1. num1=5
  2. num2=0
  3. print(num1/num2)
  4. except ZeroDivisionError:
  5. print("Error Occured")
  6. finally:
  7. print("This code will run always")
Output: Error Occured
This code will run always.
output
So we can use the final statement in each exception for running always code in the final statement. I hope you will understand this part of the python programming language.