mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-29 14:15:07 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

Issue #1727780: Support loading pickles of random.Random objects created

Browse source 
on 32-bit systems on 64-bit systems, and vice versa. As a consequence
of the change, Random pickles created by Python 2.6 cannot be loaded
in Python 2.5.
This commit is contained in:
Martin v. Löwis 2007-12-03 19:20:02 +00:00
parent 2ec7415db5
commit 6b449f4f2b
10 changed files with 1944 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

15
Lib/random.py
View file

@ -83,7 +83,7 @@ class Random(_random.Random):
"""
VERSION = 2 # used by getstate/setstate
VERSION = 3 # used by getstate/setstate
def __init__(self, x=None):
"""Initialize an instance.
@ -120,9 +120,20 @@ class Random(_random.Random):
def setstate(self, state):
"""Restore internal state from object returned by getstate()."""
version = state[0]
if version == 2:
if version == 3:
version, internalstate, self.gauss_next = state
super(Random, self).setstate(internalstate)
elif version == 2:
version, internalstate, self.gauss_next = state
# In version 2, the state was saved as signed ints, which causes
# inconsistencies between 32/64-bit systems. The state is
# really unsigned 32-bit ints, so we convert negative ints from
# version 2 to positive longs for version 3.
try:
internalstate = tuple( long(x) % (2**32) for x in internalstate )
except ValueError, e:
raise TypeError, e
super(Random, self).setstate(internalstate)
else:
raise ValueError("state with version %s passed to "
"Random.setstate() of version %s" %