Exception Handling (Try-Except) An exception handling mechanism allows your program to gracefully handle and recover from specific error conditions...
Exception Handling (Try-Except)
An exception handling mechanism allows your program to ** gracefully handle and recover from specific error conditions** in a controlled manner. This is achieved through the use of the try and except blocks.
Try block:
The try block contains the code that is expected to produce an error.
It uses the except keyword to specify the type of error you expect to handle.
except block consists of a block that is executed if an exception of specified type is raised.
Example:
python
try:
data = input("Enter a number: ")
age = int(data)
if age <= 0:
raise ValueError("Invalid age")
except ValueError as e:
ValueErrorprint(f"Invalid age: {e}")
How it works:
When an exception occurs within the try block, it is caught by the Python runtime.
The specific exception type is identified using the except clause.
The except block is executed to handle the error.
Depending on the type of exception caught, different messages or actions can be performed.
Benefits of Exception Handling:
Prevents program crashes and unexpected termination.
Provides a structured way to handle specific error conditions.
Allows you to perform cleanup or take specific actions before exiting the program.
Simplifies error reporting and debugging.
Additional Notes:
Multiple except blocks can be used to handle different types of exceptions.
The except block can also have a finally block that is executed regardless of whether an exception is raised.
Exception handling is particularly useful when working with I/O operations or interacting with external libraries