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Diffstat (limited to 'Doc/reference/compound_stmts.rst')
| -rw-r--r-- | Doc/reference/compound_stmts.rst | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/Doc/reference/compound_stmts.rst b/Doc/reference/compound_stmts.rst index 8e68081..96bd9b0 100644 --- a/Doc/reference/compound_stmts.rst +++ b/Doc/reference/compound_stmts.rst @@ -1244,9 +1244,13 @@ following the parameter name. Any parameter may have an annotation, even those ``*identifier`` or ``**identifier``. Functions may have "return" annotation of the form "``-> expression``" after the parameter list. These annotations can be any valid Python expression. The presence of annotations does not change the -semantics of a function. The annotation values are available as string values -in a dictionary keyed by the parameters' names in the :attr:`__annotations__` -attribute of the function object. +semantics of a function. The annotation values are available as values of +a dictionary keyed by the parameters' names in the :attr:`__annotations__` +attribute of the function object. If the ``annotations`` import from +:mod:`__future__` is used, annotations are preserved as strings at runtime which +enables postponed evaluation. Otherwise, they are evaluated when the function +definition is executed. In this case annotations may be evaluated in +a different order than they appear in the source code. .. index:: pair: lambda; expression |