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Issue 7410: deepcopy of itertools.count resets the count

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Raymond Hettinger 2009-11-30 19:44:40 +00:00
parent d46430bd81
commit e09f45a2e3
2 changed files with 25 additions and 1 deletions
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9
Lib/test/test_itertools.py
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@ -7,6 +7,8 @@ from fractions import Fraction
import sys
import operator
import random
import copy
import pickle
maxsize = test_support.MAX_Py_ssize_t
minsize = -maxsize-1
@ -346,6 +348,13 @@ class TestBasicOps(unittest.TestCase):
r2 = 'count(%r)'.__mod__(i).replace('L', '')
self.assertEqual(r1, r2)
# check copy, deepcopy, pickle
for value in -3, 3, sys.maxint-5, sys.maxint+5:
c = count(value)
self.assertEqual(next(copy.copy(c)), value)
self.assertEqual(next(copy.deepcopy(c)), value)
self.assertEqual(next(pickle.loads(pickle.dumps(c))), value)
def test_count_with_stride(self):
self.assertEqual(zip('abc',count(2,3)), [('a', 2), ('b', 5), ('c', 8)])
self.assertEqual(zip('abc',count(start=2,step=3)),