diff options
Diffstat (limited to 'Lib/random.py')
| -rw-r--r-- | Lib/random.py | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Lib/random.py b/Lib/random.py index e2bfcfd..d8d2c1e 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -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().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( x % (2**32) for x in internalstate ) + except ValueError as e: + raise TypeError from e + super(Random, self).setstate(internalstate) else: raise ValueError("state with version %s passed to " "Random.setstate() of version %s" % |