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PEP 591: some minor cleanups (#994) 

- Fix some typos
 - Clarify that @final can't be used on non-method functions
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Michael J. Sullivan 2019-04-15 16:57:52 -07:00 committed by Guido van Rossum
parent 5165c953e6
commit c4c4bd7b9c
1 changed files with 3 additions and 3 deletions
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@ -57,7 +57,7 @@ situations:
subclasses. (``@property`` can make an attribute read-only but subclasses. (``@property`` can make an attribute read-only but
does not prevent overriding) does not prevent overriding)
* Allowing a name to be used in situations where ordinarily a literal * Allowing a name to be used in situations where ordinarily a literal
is expected (for example as a file name for ``NamedTuple``, a tuple is expected (for example as a field name for ``NamedTuple``, a tuple
of types passed to ``isinstance``, or an argument to a function of types passed to ``isinstance``, or an argument to a function
with arguments of ``Literal`` type [#PEP-586]_). with arguments of ``Literal`` type [#PEP-586]_).
@ -115,6 +115,8 @@ implementation (or on the first overload, for stubs)::
def method(self, x=None): def method(self, x=None):
... ...
It is an error to use ``@final`` on a non-method function.
The ``Final`` annotation The ``Final`` annotation
------------------------ ------------------------
@ -175,8 +177,6 @@ names in type-checked code::
for x in [1, 2, 3]: for x in [1, 2, 3]:
FOO: Final = x # Error: Cannot use Final inside a loop FOO: Final = x # Error: Cannot use Final inside a loop
error: Cannot use Final inside a loop
Additionally, a type checker should prevent final attributes from Additionally, a type checker should prevent final attributes from
being overridden in a subclass:: being overridden in a subclass::