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From 2958f6327ad3a5222eb773801e3e46f6130d9f65 Mon Sep 17 00:00:00 2001
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From: "Benjamin A. Beasley" <code@musicinmybrain.net>
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Date: Tue, 14 Jun 2022 11:27:05 -0400
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Subject: [PATCH] Preserve existing Random seed behavior in Python 3.11
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Fixes #602. See
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https://github.com/holoviz/param/issues/602#issuecomment-1155147795 for
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rationale and caveats.
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---
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numbergen/__init__.py | 13 ++++++++++++-
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1 file changed, 12 insertions(+), 1 deletion(-)
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diff --git a/numbergen/__init__.py b/numbergen/__init__.py
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index 2faf2bcb..d8ad7e1b 100644
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--- a/numbergen/__init__.py
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+++ b/numbergen/__init__.py
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@@ -8,6 +8,7 @@
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import struct
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import fractions
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+from ctypes import c_size_t
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from math import e,pi
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import param
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@@ -306,8 +307,18 @@ class TimeAwareRandomState(TimeAware):
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explicitly when you construct the RandomDistribution object.
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"""
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+ # Historically, the default random state was seeded with the tuple
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+ # (500, 500). The CPython implementation implicitly formed an unsigned
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+ # integer seed using the hash of the tuple as in the expression below. Note
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+ # that the resulting integer, and therefore the default initial random
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+ # state, varies across CPython versions (as the hash algorithm has changed)
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+ # and also between 32-bit and 64-bit interpreters.
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+ #
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+ # Seeding based on hashing is deprecated since Python 3.9 and removed in
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+ # Python 3.11; we explicitly continue the historical behavior for the time
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+ # being.
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random_generator = param.Parameter(
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- default=random.Random((500,500)), doc=
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+ default=random.Random(c_size_t(hash((500,500))).value), doc=
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"""
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Random state used by the object. This may may be an instance
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of random.Random from the Python standard library or an
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