Fixed memoryview constructor. It allowed arbitrary keyword arguments. The bug was found by mykhal from #python. I've also added a small test case in the new test_memoryview.py

Lib/test/test_memoryview.py

@@ -0,0 +1,25 @@
+"""Unit tests for the memoryview
+
+XXX We need more tests! Some tests are in test_bytes
+"""
+
+import unittest
+import test.test_support
+
+class MemoryviewTest(unittest.TestCase):
+
+    def test_constructor(self):
+        ob = b'test'
+        self.assert_(memoryview(ob))
+        self.assert_(memoryview(object=ob))
+        self.assertRaises(TypeError, memoryview)
+        self.assertRaises(TypeError, memoryview, ob, ob)
+        self.assertRaises(TypeError, memoryview, argument=ob)
+        self.assertRaises(TypeError, memoryview, ob, argument=True)
+
+def test_main():
+    test.test_support.run_unittest(MemoryviewTest)
+
+
+if __name__ == "__main__":
+    test_main()