What is scope in Python?

Scope is the part of a program where a variable can be used. Python looks for a name in four places, in this order, which is called the LEGB rule.

Scope	Meaning
Local	Names created inside the current function
Enclosing	Names in an outer function that wraps the current one
Global	Names created at the top level of the file
Built-in	Names Python already has, like len and print

x = "global"

def outer():
    x = "enclosing"

    def inner():
        x = "local"
        print(x)

    inner()
    print(x)

outer()
print(x)

Output:

Use the global keyword to change a global variable inside a function, and nonlocal for a variable of the outer function. See Scope of Variables in Python.

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