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Code Issues Projects Releases Packages Wiki Activity Actions 17

Make built-in zip() equal to itertools.izip().

Browse source 
I mea, *really* equal -- for now, the implementation just imports
itertools. :-)
The only other changes necessary were various unit tests that were
assuming zip() returns a real list.  No "real" code made this assumption.
This commit is contained in:
Guido van Rossum 2006-08-24 19:48:10 +00:00
parent d38abe9484
commit 801f0d78b5
6 changed files with 62 additions and 139 deletions
Download patch file Download diff file Expand all files Collapse all files

16
Lib/test/test_builtin.py
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@ -1554,18 +1554,18 @@ class BuiltinTest(unittest.TestCase):
a = (1, 2, 3)
b = (4, 5, 6)
t = [(1, 4), (2, 5), (3, 6)]
self.assertEqual(zip(a, b), t)
self.assertEqual(list(zip(a, b)), t)
b = [4, 5, 6]
self.assertEqual(zip(a, b), t)
self.assertEqual(list(zip(a, b)), t)
b = (4, 5, 6, 7)
self.assertEqual(zip(a, b), t)
self.assertEqual(list(zip(a, b)), t)
class I:
def __getitem__(self, i):
if i < 0 or i > 2: raise IndexError
return i + 4
self.assertEqual(zip(a, I()), t)
self.assertEqual(zip(), [])
self.assertEqual(zip(*[]), [])
self.assertEqual(list(zip(a, I())), t)
self.assertEqual(list(zip()), [])
self.assertEqual(list(zip(*[])), [])
self.assertRaises(TypeError, zip, None)
class G:
pass
@ -1581,7 +1581,7 @@ class BuiltinTest(unittest.TestCase):
else:
return i
self.assertEqual(
zip(SequenceWithoutALength(), xrange(2**30)),
list(zip(SequenceWithoutALength(), xrange(2**30))),
list(enumerate(range(5)))
)
@ -1591,7 +1591,7 @@ class BuiltinTest(unittest.TestCase):
raise ValueError
else:
return i
self.assertRaises(ValueError, zip, BadSeq(), BadSeq())
self.assertRaises(ValueError, list, zip(BadSeq(), BadSeq()))
class TestSorted(unittest.TestCase):