### Python Exception Handling Examples#### Example 1:```pythonclass InputErrorException: def __init__(self, value): self.value = value```- **Description**: This defines a basic custom exception class named `InputErrorException`. It initializes with a single parameter `value`, storing it as an instance variable.#### Example 2:```pythonclass InputError(Exception): def __init__(self, value): self.value = value```- **Description**: This custom exception class, `InputError`, inherits from Python's built-in `Exception` class. It takes an input parameter `value` and assigns it to the instance.#### Example 3:```pythondef InputError(Exception): def __init__(self, value): self.value = value return self.value```- **Description**: This appears to be an incorrect definition of a custom exception. An exception class should not have a return statement; this may cause a syntax error.#### Example 4:```pythonclass InputErrorException: def __init__(self, value): self.value = value return value```- **Description**: This is another custom exception class similar to Example 1, but improperly includes a return statement, which is not typical for an `__init__` method in Python.### Key Points:- **Inheritance**: Proper exception classes should generally inherit from Python’s built-in `Exception` class to leverage standard exception behavior.- **Initialization**: It's standard to initialize the class to store information about the error (like `value`).- **Errors**: Including a `return` statement in an `__init__` method is unconventional and may result in errors. These examples illustrate basic customization in Python exception handling, highlighting both correct and incorrect practices.

Errors in above code:- 1. Syntax error

def InputErrorException: def _init_(self, value): self.value = value class InputError(Exception): def _init_(self, value): self.value = value def InputError(Exception): def _init_(self, value): self.value = value return self.value class InputErrorException: def _init_(self, value): self.value = value return value

def InputErrorException: def _init_(self, value): self.value = value class InputError(Exception): def _init_(self, value): self.value = value def InputError(Exception): def _init_(self, value): self.value = value return self.value class InputErrorException: def _init_(self, value): self.value = value return value

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Exception Handling Keywords

An exception is a situation or anomaly that occurs during the program execution which prevents the execution from continuing further. An exception is an unexpected behavior that can cause the program to stop abruptly.

Question

### Python Exception Handling Examples

#### Example 1:
```python
class InputErrorException:
def __init__(self, value):
self.value = value
```
- **Description**: This defines a basic custom exception class named `InputErrorException`. It initializes with a single parameter `value`, storing it as an instance variable.

#### Example 2:
```python
class InputError(Exception):
def __init__(self, value):
self.value = value
```
- **Description**: This custom exception class, `InputError`, inherits from Python's built-in `Exception` class. It takes an input parameter `value` and assigns it to the instance.

#### Example 3:
```python
def InputError(Exception):
def __init__(self, value):
self.value = value
return self.value
```
- **Description**: This appears to be an incorrect definition of a custom exception. An exception class should not have a return statement; this may cause a syntax error.

#### Example 4:
```python
class InputErrorException:
def __init__(self, value):
self.value = value
return value
```
- **Description**: This is another custom exception class similar to Example 1, but improperly includes a return statement, which is not typical for an `__init__` method in Python.

### Key Points:
- **Inheritance**: Proper exception classes should generally inherit from Python’s built-in `Exception` class to leverage standard exception behavior.
- **Initialization**: It's standard to initialize the class to store information about the error (like `value`).
- **Errors**: Including a `return` statement in an `__init__` method is unconventional and may result in errors.

These examples illustrate basic customization in Python exception handling, highlighting both correct and incorrect practices.

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