Exceptions

Rather than leaving the program to crash when an error occurs, exceptions give us a chance to handle the error more gracefully.

Exceptions

When an error arises in a program, the program is said to 'throw' an exception.
An exception is a description of the error that arose.
Exceptions can be 'caught' or handled rather than allowing the program to crash.

Handling exceptions

If an exception can be dealt with internally, then we can catch the exception and continue with the program.
This is done using a structure as below:
- try: ---
- except: ---
The code within the try block will be executed.
- If an exception is thrown inside the try block, then the except block will be run to 'clean up' after the exception.

1Introduction to Python

1.1Python

1.1.1Python

1.2Input & Output

1.2.1Input & Output

1.3Data Types

1.3.1Data Types

1.4Variables & Constants

1.4.1Variables & Constants

1.5Operators

1.5.1Arithmetic & Relational Operators

1.5.2Boolean & Assignment Operators 2

1.6Program Flow

1.6.1Selection

1.6.2Iteration

2Data Structures

2.1Lists & Strings

2.1.1Lists

2.1.2Strings

2.2File Handling

2.2.1File Handling

3Modularity

3.1Subroutines

3.1.1Subroutines

3.2Data Flow

3.2.1Data Flow

4Good Practice

4.1Naming & Whitespace

4.1.1Identifiers

4.1.2Whitespace

4.2Comments

4.2.1Comments

4.3Exceptions

4.3.1Exceptions

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