我们从Python开源项目中，提取了以下11个代码示例，用于说明如何使用dbm.ndbm()。
def test_whichdb_ndbm(self): # Issue 17198: check that ndbm which is referenced in whichdb is defined db_file = '{}_ndbm.db'.format(_fname) with open(db_file, 'w'): self.addCleanup(test.support.unlink, db_file) self.assertIsNone(self.dbm.whichdb(db_file[:-3]))
def setUp(self): self.filename = support.TESTFN self.d = dbm.ndbm.open(self.filename, 'c') self.d.close()
def test_keys(self): self.d = dbm.ndbm.open(self.filename, 'c') self.assertTrue(self.d.keys() == []) self.d['a'] = 'b' self.d[b'bytes'] = b'data' self.d['12345678910'] = '019237410982340912840198242' self.d.keys() self.assertIn('a', self.d) self.assertIn(b'a', self.d) self.assertEqual(self.d[b'bytes'], b'data') self.d.close()
def test_modes(self): for mode in ['r', 'rw', 'w', 'n']: try: self.d = dbm.ndbm.open(self.filename, mode) self.d.close() except error: self.fail()
def test_context_manager(self): with dbm.ndbm.open(self.filename, 'c') as db: db["ndbm context manager"] = "context manager" with dbm.ndbm.open(self.filename, 'r') as db: self.assertEqual(list(db.keys()), [b"ndbm context manager"]) with self.assertRaises(dbm.ndbm.error) as cm: db.keys() self.assertEqual(str(cm.exception), "DBM object has already been closed")
