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gh-137376: Add note on top-level global declarations #137707

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gh-137376: Add note on top-level global declarations #137707

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11 changes: 9 additions & 2 deletions Doc/reference/simple_stmts.rst
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Expand Up @@ -971,10 +971,17 @@ as globals. It would be impossible to assign to a global variable without
:keyword:`!global`, although free variables may refer to globals without being
declared global.

The :keyword:`global` statement applies to the entire scope of a function or
class body. A :exc:`SyntaxError` is raised if a variable is used or
The :keyword:`!global` statement applies to the entire current scope
(module, function body or class class definition).
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(module, function body or class class definition).
(module, function body or class definition).

A :exc:`SyntaxError` is raised if a variable is used or
assigned to prior to its global declaration in the scope.

At the module level, all variables are global, so a :keyword:`!global`
statement has no effect.
However, variables must still not be used or
assigned to prior to their :keyword:`!global` declaration.
This requirement is relaxed in the interactive prompt (:term:`REPL`).

.. index::
pair: built-in function; exec
pair: built-in function; eval
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