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bpo-32554: Deprecate hashing arbitrary types in random.seed() #15382
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I am just interesting, why implement a warning in random.Random.seed()
instead of _random.Random.seed()
?
Doc/library/random.rst
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@@ -86,6 +86,11 @@ Bookkeeping functions | |||
.. versionchanged:: 3.2 | |||
Moved to the version 2 scheme which uses all of the bits in a string seed. | |||
|
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.. deprecated:: 3.9 | |||
In the future, the *seed* must be one of the following types: | |||
:class:`NoneType`, :class:`int`, :class:`float`, :class:`str`, |
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There is no an entry for NoneType
, so the link will not work.
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Is float
because of seed(time.time())
?
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Yes.
Lib/random.py
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elif not isinstance(a, (type(None), int, float, str, bytes, bytearray)): | ||
_warn('Seeding based on hashing is deprecated\n' | ||
'since Python 3.9 and will be removed in a subsequent ' | ||
'version. The only \nsupported seed types are: None, ' |
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I would break a string literal and a line after \n
for readability
Doc/whatsnew/3.9.rst
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possible seed value. Unfortunately, some of those types are not | ||
guaranteed to have a deterministic hash value. After Python 3.9, | ||
the module will restrict its seeds to *None*, :class:`int`, | ||
:class:`float`, :class:`str`, :class:`bytes`, and :class:`bytearray'. |
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:class:`float`, :class:`str`, :class:`bytes`, and :class:`bytearray'. | |
:class:`float`, :class:`str`, :class:`bytes`, and :class:`bytearray`. |
Excuse my density and lateness, but why was this feature deprecated and removed instead of being fixed? Couldn't you use a non-random hash? The Python standard library already provides a wide variety of hashes in |
It is unrelated. |
Makes the following changes: - Added `float` to the `Union` for `Seed`. - Added `None` to the `Union` for `Seed`. - Replaced `Optional[Seed]` with `Seed` everywhere. See the following links for details: - https://bugs.python.org/issue32554 - python/cpython#15382 - https://docs.python.org/3.9/library/random.html#random.seed Currently `typeshed` is still using `Any`.
Makes the following changes: - Added `float` to the `Union` for `Seed`. - Added `None` to the `Union` for `Seed`. - Replaced `Optional[Seed]` with `Seed` everywhere. See the following links for details: - https://bugs.python.org/issue32554 - python/cpython#15382 - https://docs.python.org/3.9/library/random.html#random.seed Currently `typeshed` is still using `Any`.
Makes the following changes: - Added `float` to the `Union` for `Seed`. - Added `None` to the `Union` for `Seed`. - Replaced `Optional[Seed]` with `Seed` everywhere. See the following links for details: - https://bugs.python.org/issue32554 - python/cpython#15382 - https://docs.python.org/3.9/library/random.html#random.seed Currently `typeshed` is still using `Any`.
Makes the following changes: - Added `float` to the `Union` for `Seed`. - Added `None` to the `Union` for `Seed`. - Replaced `Optional[Seed]` with `Seed` everywhere. See the following links for details: - https://bugs.python.org/issue32554 - python/cpython#15382 - https://docs.python.org/3.9/library/random.html#random.seed Currently `typeshed` is still using `Any`.
Makes the following changes: - Added `float` to the `Union` for `Seed`. - Added `None` to the `Union` for `Seed`. - Replaced `Optional[Seed]` with `Seed` everywhere. See the following links for details: - https://bugs.python.org/issue32554 - python/cpython#15382 - https://docs.python.org/3.9/library/random.html#random.seed Currently `typeshed` is still using `Any`.
https://bugs.python.org/issue32554