Python Global Variables

In this tutorial, you’ll learn what is a global variable in Python and how to use them effectively.

Goals of this lesson:

• Understand what is a global variable in Python with examples
• Use global variables across multiple functions
• Learn how to use the global keyword to modify the global variables
• Learn to use global variables across Python modules/files
• Understand the use of globals() function
• Use global variables inside a nested function

What is a Global Variable in Python

In Python, a variable declared outside the function or in global scope is known as a global variable. We can use global variables both inside and outside the function.

The scope of a global variable is broad. It is accessible in all functions of the same module.