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Kill reduce(). A coproduction of John Reese, Jacques Frechet, and Alex M.

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This commit is contained in:
Guido van Rossum 2006-08-22 00:21:25 +00:00
parent 6cefeb0e81
commit 89da5d7c3d
10 changed files with 25 additions and 144 deletions
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26
Lib/test/test_builtin.py
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@ -1393,32 +1393,6 @@ def __cmp__(self, other):
self.assertRaises(OverflowError, range, -sys.maxint, sys.maxint)
self.assertRaises(OverflowError, range, 0, 2*sys.maxint)
def test_reduce(self):
self.assertEqual(reduce(lambda x, y: x+y, ['a', 'b', 'c'], ''), 'abc')
self.assertEqual(
reduce(lambda x, y: x+y, [['a', 'c'], [], ['d', 'w']], []),
['a','c','d','w']
)
self.assertEqual(reduce(lambda x, y: x*y, range(2,8), 1), 5040)
self.assertEqual(
reduce(lambda x, y: x*y, range(2,21), 1L),
2432902008176640000L
)
self.assertEqual(reduce(lambda x, y: x+y, Squares(10)), 285)
self.assertEqual(reduce(lambda x, y: x+y, Squares(10), 0), 285)
self.assertEqual(reduce(lambda x, y: x+y, Squares(0), 0), 0)
self.assertRaises(TypeError, reduce)
self.assertRaises(TypeError, reduce, 42, 42)
self.assertRaises(TypeError, reduce, 42, 42, 42)
self.assertEqual(reduce(42, "1"), "1") # func is never called with one item
self.assertEqual(reduce(42, "", "1"), "1") # func is never called with one item
self.assertRaises(TypeError, reduce, 42, (42, 42))
class BadSeq:
def __getitem__(self, index):
raise ValueError
self.assertRaises(ValueError, reduce, 42, BadSeq())
def test_reload(self):
import marshal
reload(marshal)