SF bug #759889: Pickling of Random is broken
* Implement __reduce__() to support pickling.
* Add a test case to prove a successful roundtrip through pickle.
diff --git a/Lib/random.py b/Lib/random.py
index 1ae2553..1a0b8f3 100644
--- a/Lib/random.py
+++ b/Lib/random.py
@@ -123,6 +123,9 @@
def __setstate__(self, state): # for pickle
self.setstate(state)
+ def __reduce__(self):
+ return self.__class__, (), self.getstate()
+
## -------------------- integer methods -------------------
def randrange(self, start, stop=None, step=1, int=int, default=None):
diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py
index 970b862..ea2243d 100644
--- a/Lib/test/test_random.py
+++ b/Lib/test/test_random.py
@@ -3,6 +3,7 @@
import unittest
import random
import time
+import pickle
from math import log, exp, sqrt, pi
from sets import Set
from test import test_support
@@ -102,6 +103,12 @@
self.assertEqual(x1, x2)
self.assertEqual(y1, y2)
+ def test_pickling(self):
+ state = pickle.dumps(self.gen)
+ origseq = [self.gen.random() for i in xrange(10)]
+ newgen = pickle.loads(state)
+ restoredseq = [newgen.random() for i in xrange(10)]
+ self.assertEqual(origseq, restoredseq)
class WichmannHill_TestBasicOps(TestBasicOps):
gen = random.WichmannHill()