exception_handling.md

Exception Handling in Python

What is exception handling?

Exception handling is the process of responding to exceptions when a computer program runs. An exception occurs when an unexpected event happens that requires special processing.

Python exception handing:

The try block lets you test a block of code for errors.

The except block lets you handle the error.

The finally block lets you execute code, regardless of the result of the try- and except blocks.

How to use:

try:
  print(x)
except:
  print("An exception occurred")

Example

without exception handling

>>> print( 0 / 0)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ZeroDivisionError: integer division or modulo by zero

after exception handling

try:
  print( 0 / 0)
except ZeroDivisionError:
  print ("denominator can't be zero.")
finally:
  print ("you handled exception very well")

output of above code

denominator can't be zero.
you handled exception very well