Types of Exceptions

Python Programming For Beginners

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Types of Exceptions

Built-in Exceptions

Definition: Built-in exceptions are predefined errors in Python that are raised when the interpreter encounters an error during execution.
Common Built-in Exceptions:
- ZeroDivisionError: Raised when division by zero is attempted. python
```
print(10 / 0) # Raises ZeroDivisionError
```
- IndexError: Raised when trying to access an index that is out of range. python
```
my_list = [1, 2, 3] print(my_list[5]) # Raises IndexError
```
- KeyError: Raised when trying to access a key that does not exist in a dictionary. python
```
my_dict = {'name': 'Alice'} print(my_dict['age']) # Raises KeyError
```
- TypeError: Raised when an operation or function is applied to an object of inappropriate type. python
```
print("Hello" + 5) # Raises TypeError
```

Custom Exceptions

Definition: Custom exceptions are user-defined errors that can be created to handle specific situations in a program.

Creating Custom Exceptions: python

class CustomError(Exception): pass def check_value(value): if value < 0: raise CustomError("Value cannot be negative") try: check_value(-1) except CustomError as e: print(e) # Output: Value cannot be negative

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Try-Except-Finally
Raising exceptions