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Replace map(None, *iterables) with zip(*iterables).

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This commit is contained in:
Raymond Hettinger 2008-01-22 23:25:35 +00:00
parent 86def6cb2b
commit 1dfde1ddc0
9 changed files with 20 additions and 90 deletions
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21
Lib/test/test_builtin.py
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@ -1099,18 +1099,6 @@ class BuiltinTest(unittest.TestCase):
# self.assertRaises(TypeError, long, Foo5())
def test_map(self):
self.assertEqual(
list(map(None, 'hello')),
[('h',), ('e',), ('l',), ('l',), ('o',)]
)
self.assertEqual(
list(map(None, 'abcd', 'efg')),
[('a', 'e'), ('b', 'f'), ('c', 'g')]
)
self.assertEqual(
list(map(None, range(3))),
[(0,), (1,), (2,)]
)
self.assertEqual(
list(map(lambda x: x*x, range(1,4))),
[1, 4, 9]
@ -1145,18 +1133,10 @@ class BuiltinTest(unittest.TestCase):
list(map(plus, [1, 3, 7], [4, 9, 2], [1, 1, 0])),
[1+4+1, 3+9+1, 7+2+0]
)
self.assertEqual(
list(map(None, Squares(10))),
[(0,), (1,), (4,), (9,), (16,), (25,), (36,), (49,), (64,), (81,)]
)
self.assertEqual(
list(map(int, Squares(10))),
[0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
)
self.assertEqual(
list(map(None, Squares(3), Squares(2))),
[(0,0), (1,1)]
)
def Max(a, b):
if a is None:
return b
@ -1169,7 +1149,6 @@ class BuiltinTest(unittest.TestCase):
)
self.assertRaises(TypeError, map)
self.assertRaises(TypeError, map, lambda x: x, 42)
self.assertEqual(list(map(None, [42])), [(42,)])
class BadSeq:
def __iter__(self):
raise ValueError