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#1506171: added operator.methodcaller().

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This commit is contained in:
Georg Brandl 2008-02-23 23:04:35 +00:00
parent e2065c65d3
commit ebcfd11c16
4 changed files with 169 additions and 0 deletions
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18
Lib/test/test_operator.py
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@ -440,6 +440,24 @@ class OperatorTestCase(unittest.TestCase):
self.assertEqual(operator.itemgetter(2,10,5)(data), ('2', '10', '5'))
self.assertRaises(TypeError, operator.itemgetter(2, 'x', 5), data)
def test_methodcaller(self):
self.assertRaises(TypeError, operator.methodcaller)
class A:
def foo(self, *args, **kwds):
return args[0] + args[1]
def bar(self, f=42):
return f
a = A()
f = operator.methodcaller('foo')
self.assertRaises(IndexError, f, a)
f = operator.methodcaller('foo', 1, 2)
self.assertEquals(f(a), 3)
f = operator.methodcaller('bar')
self.assertEquals(f(a), 42)
self.assertRaises(TypeError, f, a, a)
f = operator.methodcaller('bar', f=5)
self.assertEquals(f(a), 5)
def test_inplace(self):
class C(object):
def __iadd__ (self, other): return "iadd"