Try Except

What is Python try and except?

The try and except statements are used to handle errors in Python. The try statement is used to enclose code that may raise an exception. If an exception is raised, the except statement is used to handle the exception.

Basic usage of try and except

The basic syntax of the try and except statements is as follows:

 

Python

try:
  # Code that may raise an exception
except Exception as e:
  # Handle the exception
 

The try block is where you place the code that may raise an exception. The except block is where you handle the exception.

Handling specific exceptions

You can also handle specific exceptions by specifying the exception type in the except statement. For example, the following code handles the ValueError exception:

 

Python

try:
  # Code that may raise a ValueError exception
except ValueError as e:
  # Handle the ValueError exception
 

Multiple except blocks

You can also have multiple except blocks to handle different types of exceptions. For example, the following code handles the ValueError and IndexError exceptions:

 

Python

try:
  # Code that may raise a ValueError or IndexError exception
except ValueError as e:
  # Handle the ValueError exception
except IndexError as e:
  # Handle the IndexError exception
 

Handling all exceptions

You can also use the general Exception type to handle all exceptions. For example, the following code handles all exceptions:

 

Python

try:
  # Code that may raise any exception
except Exception as e:
  # Handle any exception
 

Using finally

The finally clause is used to execute code after the try and except blocks have been executed. The finally clause is always executed, regardless of whether or not an exception is raised.

Example:

 

Python

try:
  # Code that may raise an exception
except Exception as e:
  # Handle the exception
finally:
  # Code that is always executed
 

Conclusion

The try and except statements are a powerful tool for handling errors in Python. By understanding how to use try and except, you can write more robust code that can handle unexpected errors.