Python Exception Handling

May 17th, 2019

Python Exception Handling

Python has many built-in exceptions which handles a program and throw error on console if program is not properly working
When these exception error occurs, python should handle this exception properly to avoid program crash
It is used to handle errors in python.
Raise an exception in your program by using the raise exception statement.

Exception Errors:

Exception Name	Definition
Exception	It is a class for all exceptions
Stop iteration	It rises when next() method of an iterator does not point to any yield object
SystemExit	Raised by sys.exit() function.
StandardError	Base class for all built-in exceptions except StopIteration and SystemExit.
ArithmeticError	Base class for all errors that occur for arithmetic calculation.
ImportError	Raised when an import statement fails.
IndexError	Raised when an index is not found in a sequence of list or tuple.
IOError	Raised when an input/ output operation fails, such as the print statement etc….
SyntaxError	Raised when there is an syntax error in script
IndentationError	Raised when indentation is not specified correctly.
TypeError	Raised when an operation or function is attempted that is invalid for the specified data type.
ValueError	Raised when the built-in function for a data type has the valid type of arguments, but the arguments have invalid values specified.
RuntimeError	Raised when a generated error does not comes into any category

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Examples for Exception Error:

Exception Handling Errors

How to Handle an Exception Error:

try-except exception:

‘try’ and ‘except’ are Python identifiers which is used to handle this exceptions.·

Syntax:

Example:

try-finally Exception:

It is intended to define actions that should be execute under all circumstances· A finally clause is always executes before leaving the try statement, whether an exception has occurred previously or not.