How to use Python try…except…finally

Summary: In this article, I will demonstrate how to use Python try…except…finally statement.

Introduction to Python try…catch…finally statement

List most programming languages, Python supports catching and handling exceptions during runtime. The try… except is the most common tool. It allows you to catch one or more exceptions in the tryclause and handle each of them in the exceptclauses.-

The statement also has an optional clause called finally:

• The finally clause always executes whether an exception occurs or not. And it executes after the try… exceptstatement.

try:
    # code that might cause exceptions
except:
    # code that handle exceptions
finally:
    # code that always executes

Python try … finally statement

The catch clause is also optional, so you can use it like this:

try:
    # code that might cause exceptions
finally:
    # code that always executes

Typically, you might use this statement when you cannot handle the exception but you want to release some external resources. For example, you want to close database connection that has been built.

Python try … else statement