Impara Built-In and Global Scopes

As mentioned earlier, the global scope is your code's main scope (environment). Every script (.py file) has its global scope.


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first = "This"
second = "is"
third = "the"
fourth = "main"
fifth = "scope"

print(first, second, third, fourth, fifth)

Note

There is only the built-in scope out of the global scope.

We can use functionality from outer scopes in inner scopes. This means that we can use built-in functionality in the global scope as well as in local scopes, which are nested within the global scope.

Look at the example:


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print(len("some string"))  # built-in objects usage

number = 15  # global scope

def print_number():
    print(number)  # global object usage

print_number()

In the example above, the global variable number is used inside the print_number() function local scope.

You can access variables and functions from outer scopes but cannot change them:


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number = 221

def modify_global():
    number += 5

modify_global()
print(number)

You can access the change of a global variable/function using the global keyword:


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number = 20
print(number)

def modify_global():
    global number
    number += 10

modify_global()
print(number)

modify_global()
print(number)

1. What scope is the main scope of your code?

2. What scope is the Python Tools scope?

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Sezione 1. Capitolo 2

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