我们从Python开源项目中，提取了以下9个代码示例，用于说明如何使用operator.getslice()。
def test_getslice(self): a = range(10) self.assertRaises(TypeError, operator.getslice) self.assertRaises(TypeError, operator.getslice, a, None, None) self.assertTrue(operator.getslice(a, 4, 6) == [4, 5]) b = operator.getslice(a, 0, test_support.MAX_Py_ssize_t) self.assertTrue(b == a)
def test_simple(self): # create classes holding simple numeric types, and check # various properties. init = range(15, 25) for fmt in formats: alen = len(init) int_array = ARRAY(fmt, alen) ia = int_array(*init) # length of instance ok? self.assertEqual(len(ia), alen) # slot values ok? values = [ia[i] for i in range(len(init))] self.assertEqual(values, init) # change the items from operator import setitem new_values = range(42, 42+alen) [setitem(ia, n, new_values[n]) for n in range(alen)] values = [ia[i] for i in range(len(init))] self.assertEqual(values, new_values) # are the items initialized to 0? ia = int_array() values = [ia[i] for i in range(len(init))] self.assertEqual(values, [0] * len(init)) # Too many initializers should be caught self.assertRaises(IndexError, int_array, *range(alen*2)) CharArray = ARRAY(c_char, 3) ca = CharArray("a", "b", "c") # Should this work? It doesn't: # CharArray("abc") self.assertRaises(TypeError, CharArray, "abc") self.assertEqual(ca[0], "a") self.assertEqual(ca[1], "b") self.assertEqual(ca[2], "c") self.assertEqual(ca[-3], "a") self.assertEqual(ca[-2], "b") self.assertEqual(ca[-1], "c") self.assertEqual(len(ca), 3) # slicing is now supported, but not extended slicing (3-argument)! from operator import getslice, delitem self.assertRaises(TypeError, getslice, ca, 0, 1, -1) # cannot delete items self.assertRaises(TypeError, delitem, ca, 0)
def test_simple(self): # create classes holding simple numeric types, and check # various properties. init = range(15, 25) for fmt in formats: alen = len(init) int_array = ARRAY(fmt, alen) ia = int_array(*init) # length of instance ok? self.assertEqual(len(ia), alen) # slot values ok? values = [ia[i] for i in range(alen)] self.assertEqual(values, init) # out-of-bounds accesses should be caught with self.assertRaises(IndexError): ia[alen] with self.assertRaises(IndexError): ia[-alen-1] # change the items from operator import setitem new_values = range(42, 42+alen) [setitem(ia, n, new_values[n]) for n in range(alen)] values = [ia[i] for i in range(alen)] self.assertEqual(values, new_values) # are the items initialized to 0? ia = int_array() values = [ia[i] for i in range(alen)] self.assertEqual(values, [0] * alen) # Too many initializers should be caught self.assertRaises(IndexError, int_array, *range(alen*2)) CharArray = ARRAY(c_char, 3) ca = CharArray("a", "b", "c") # Should this work? It doesn't: # CharArray("abc") self.assertRaises(TypeError, CharArray, "abc") self.assertEqual(ca[0], "a") self.assertEqual(ca[1], "b") self.assertEqual(ca[2], "c") self.assertEqual(ca[-3], "a") self.assertEqual(ca[-2], "b") self.assertEqual(ca[-1], "c") self.assertEqual(len(ca), 3) # slicing is now supported, but not extended slicing (3-argument)! from operator import getslice, delitem self.assertRaises(TypeError, getslice, ca, 0, 1, -1) # cannot delete items self.assertRaises(TypeError, delitem, ca, 0)
