Ejemplo n.º 1
0
    def test_show_contract(self):
        # test no contract entered
        args = ['contract']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # show all contracts
        args = ['contract', 'all']
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(len(res), 6)
        self.assertEqual(res[0]["test NEX Template V4"],
                         '0x31730cc9a1844891a3bafd1aa929a4142860d8d3')

        # query with contract scripthash
        args = ['contract', '31730cc9a1844891a3bafd1aa929a4142860d8d3']
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(res['name'], "test NEX Template V4")
        self.assertEqual(res['token']['name'], "NEX Template V4")
        self.assertEqual(res['token']['symbol'], "NXT4")

        # query with a contract scripthash not on the blockchain
        args = ['contract',
                '3a4acd3647086e7c44398aac0349802e6a171129']  # NEX token hash
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # query bad input
        args = ['contract', 'blah']
        res = CommandShow().execute(args)
        self.assertFalse(res)
Ejemplo n.º 2
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    def test_show_header(self):
        # test no header input
        args = ['header']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # show good header by index
        args = ['header', '9']
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(res['index'], 9)
        self.assertNotIn('tx', res)

        # show good header by hash
        args = [
            'header',
            "0x7c5b4c8a70336bf68e8679be7c9a2a15f85c0f6d0e14389019dcc3edfab2bb4b"
        ]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(res['index'], 9)
        self.assertNotIn('tx', res)

        # request bad header
        args = ['header', 'blah']
        res = CommandShow().execute(args)
        self.assertFalse(res)
Ejemplo n.º 3
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    def test_show_tx(self):
        # test no tx input
        args = ['tx']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # show good tx
        txid = '0x83df8bd085fcb60b2789f7d0a9f876e5f3908567f7877fcba835e899b9dea0b5'
        args = ['tx', txid]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(res['txid'], txid)
        self.assertIn('height', res)
        self.assertIn('unspents', res)

        # query a bad tx
        args = [
            'tx',
            '0x83df8bd085fcb60b2789f7d0a9f876e5f3908567f7877fcba835e899b9dea0b6'
        ]
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # query with bad args
        args = ['tx', 'blah']
        res = CommandShow().execute(args)
        self.assertFalse(res)
Ejemplo n.º 4
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    def test_show_block(self):
        # test no block input
        args = ['block']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # show good block by index
        args = ['block', '9']
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(res['index'], 9)
        self.assertIn('tx', res)

        # show good block by hash
        args = [
            'block',
            "0x7c5b4c8a70336bf68e8679be7c9a2a15f85c0f6d0e14389019dcc3edfab2bb4b"
        ]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(res['index'], 9)
        self.assertIn('tx', res)

        # show the block's transactions only
        args = ['block', '9', "tx"]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(len(res), 2)
        self.assertEqual(res[0]['type'], "MinerTransaction")
        self.assertEqual(res[1]['type'], "ContractTransaction")

        # request bad block
        args = ['block', 'blah']
        res = CommandShow().execute(args)
        self.assertFalse(res)
Ejemplo n.º 5
0
    def test_show_account(self):
        # setup
        wallet_1_addr = 'AJQ6FoaSXDFzA6wLnyZ1nFN7SGSN2oNTc3'

        # test no account address entered
        args = ['account']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # test good account
        args = ['account', wallet_1_addr]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(res['address'], wallet_1_addr)
        self.assertIn('balances', res)

        # test empty account
        with patch('neo.Prompt.PromptData.PromptData.Prompt'):
            with patch('neo.Prompt.Commands.Wallet.prompt',
                       side_effect=["testpassword", "testpassword"]):
                with patch('neo.Prompt.Commands.Wallet.asyncio'):
                    with patch('neo.Wallets.Wallet.Wallet.sync_wallet'):
                        args = ['create', 'testwallet.wallet']
                        res = CommandWallet().execute(args)
                        self.assertTrue(res)
                        self.assertIsInstance(res, UserWallet)

        addr = res.Addresses[0]
        args = ['account', addr]
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # remove test wallet
        os.remove("testwallet.wallet")
Ejemplo n.º 6
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    def test_show(self):
        # with no subcommand
        res = CommandShow().execute(None)
        self.assertFalse(res)

        # with invalid command
        args = ['badcommand']
        res = CommandShow().execute(args)
        self.assertFalse(res)
Ejemplo n.º 7
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    def test_show_state(self):
        # setup
        PromptInterface()

        args = ['state']
        res = CommandShow().execute(args)
        self.assertTrue(res)
Ejemplo n.º 8
0
    def test_show_state(self, mock_SyncManager):
        # setup
        class mock_SM(Singleton):
            def init(self):
                self.block_cache = [1, 2, 3, 4,
                                    5]  # simulate blocks in the block_cache

        mock_SyncManager.return_value = mock_SM()
        PromptInterface()

        with patch('sys.stdout', new=StringIO()) as mock_print:
            args = ['state']
            res = CommandShow().execute(args)
            self.assertTrue(res)
            self.assertIn("Block-cache length 5", mock_print.getvalue())
Ejemplo n.º 9
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    def test_show_nodes(self):
        # query nodes with no NodeLeader.Instance()
        with patch('neo.Network.NodeLeader.NodeLeader.Instance'):
            args = ['nodes']
            res = CommandShow().execute(args)
            self.assertFalse(res)

        # query nodes with connected peers
        # first make sure we have a predictable state
        NodeLeader.Instance().Reset()
        leader = NodeLeader.Instance()
        addr1 = Address("127.0.0.1:20333")
        addr2 = Address("127.0.0.1:20334")
        leader.ADDRS = [addr1, addr2]
        leader.DEAD_ADDRS = [Address("127.0.0.1:20335")]
        test_node = NeoNode()
        test_node.host = "127.0.0.1"
        test_node.port = 20333
        test_node.address = Address("127.0.0.1:20333")
        leader.Peers = [test_node]

        # now show nodes
        with patch('neo.Network.NeoNode.NeoNode.Name',
                   return_value="test name"):
            args = ['nodes']
            res = CommandShow().execute(args)
            self.assertTrue(res)
            self.assertIn('Total Connected: 1', res)
            self.assertIn('Peer 0', res)

            # now use "node"
            args = ['node']
            res = CommandShow().execute(args)
            self.assertTrue(res)
            self.assertIn('Total Connected: 1', res)
            self.assertIn('Peer 0', res)
Ejemplo n.º 10
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    def test_show_asset(self):
        # test no asset entered
        args = ['asset']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # show all assets
        args = ['asset', 'all']
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(len(res), 2)
        self.assertEqual(
            res[1]['NEO'],
            "0xc56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b"
        )
        self.assertEqual(
            res[0]['NEOGas'],
            "0x602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7"
        )

        # query with "neo"
        args = ['asset', 'neo']
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(
            res['assetId'],
            "0xc56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b"
        )
        self.assertEqual(res['name'], "NEO")

        # query with "gas"
        args = ['asset', 'gas']
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(
            res['assetId'],
            "0x602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7"
        )
        self.assertEqual(res['name'], "NEOGas")

        # query with scripthash
        args = [
            'asset',
            'c56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b'
        ]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(
            res['assetId'],
            "0xc56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b"
        )
        self.assertEqual(res['name'], "NEO")

        # query with bad asset
        args = [
            'asset',
            'c56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9e'
        ]
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # query with bad input
        args = ['asset', 'blah']
        res = CommandShow().execute(args)
        self.assertFalse(res)
Ejemplo n.º 11
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    def test_show_notifications(self):
        # setup
        wallet_1_addr = 'AJQ6FoaSXDFzA6wLnyZ1nFN7SGSN2oNTc3'

        # test with no NotificationDB
        with patch(
                'neo.Implementations.Notifications.NotificationDB.NotificationDB.instance',
                return_value=None):
            args = ['notifications', wallet_1_addr]
            res = CommandShow().execute(args)
            self.assertFalse(res)

        # test with no input
        args = ['notifications']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # good test with address
        args = ['notifications', wallet_1_addr]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(len(res), 1)
        jsn = res[0].ToJson()
        self.assertEqual(jsn['notify_type'], 'transfer')
        self.assertEqual(jsn['addr_from'], wallet_1_addr)

        # test an address with no notifications
        args = ['notifications', 'AZiE7xfyJALW7KmADWtCJXGGcnduYhGiCX']
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # good test with contract
        contract_hash = "31730cc9a1844891a3bafd1aa929a4142860d8d3"
        args = ['notifications', contract_hash]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(len(res), 1)
        jsn = res[0].ToJson()
        self.assertEqual(jsn['notify_type'], 'transfer')
        self.assertIn(contract_hash, jsn['contract'])

        # good test with contract 0x hash
        contract_hash = "0x31730cc9a1844891a3bafd1aa929a4142860d8d3"
        args = ['notifications', contract_hash]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(len(res), 1)
        jsn = res[0].ToJson()
        self.assertEqual(jsn['notify_type'], 'transfer')
        self.assertEqual(contract_hash, jsn['contract'])

        # test contract not on the blockchain
        contract_hash = "3a4acd3647086e7c44398aac0349802e6a171129"  # NEX token hash
        args = ['notifications', contract_hash]
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # good test with block index
        args = ['notifications', "12337"]
        res = CommandShow().execute(args)
        self.assertTrue(res)
        self.assertEqual(len(res), 1)
        jsn = res[0].ToJson()
        self.assertEqual(jsn['notify_type'], 'transfer')
        self.assertEqual(jsn['block'], 12337)

        # test block with no notifications
        args = ['notifications', "1"]
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # test bad block
        index = Blockchain.Default().Height + 1
        args = ['notifications', str(index)]
        res = CommandShow().execute(args)
        self.assertFalse(res)

        # test invalid input
        args = ['notifications', "blah"]
        res = CommandShow().execute(args)
        self.assertFalse(res)
Ejemplo n.º 12
0
    def test_show_nodes(self):
        nodemgr = NodeManager()
        nodemgr.reset_for_test()

        # test "nodes" with no nodes connected
        args = ['nodes']
        with patch('sys.stdout', new=StringIO()) as mock_print:
            res = CommandShow().execute(args)
            self.assertFalse(res)
            self.assertIn('No nodes connected yet', mock_print.getvalue())

        # test "nodes verbose" with no nodes connected
        args = ['nodes', 'verbose']
        res = CommandShow().execute(args)
        self.assertIn('Addresses in queue: 0', res)
        self.assertIn('Known addresses: 0', res)
        self.assertIn('Bad addresses: 0', res)

        # test "nodes queued" with no nodes connected
        args = ['nodes', 'queued']
        res = CommandShow().execute(args)
        self.assertIn('No queued addresses', res)

        # test "nodes known" with no nodes connected
        args = ['nodes', 'known']
        res = CommandShow().execute(args)
        self.assertIn('No known addresses other than connect peers', res)

        # test "nodes bad" with no nodes connected
        args = ['nodes', 'bad']
        res = CommandShow().execute(args)
        self.assertIn('No bad addresses', res)

        # query nodes with connected peers
        # first make sure we have a predictable state
        node1 = NeoNode(object, object)
        node2 = NeoNode(object, object)
        node1.address = "127.0.0.1:20333"
        node2.address = "127.0.0.1:20334"
        node1.best_height = 1025
        node2.best_height = 1026
        node1.version = MagicMock()
        node2.version = MagicMock()
        node1.version.user_agent = "test_user_agent"
        node2.version.user_agent = "test_user_agent"

        nodemgr.nodes = [node1, node2]

        queued_address = "127.0.0.1:20335"
        known_address = "127.0.0.1:20336"
        bad_address = "127.0.0.1:20337"

        nodemgr.queued_addresses.append(queued_address)
        nodemgr.known_addresses.append(known_address)
        nodemgr.bad_addresses.append(bad_address)

        # now use "node"
        args = ['node']
        res = CommandShow().execute(args)
        self.assertIn("Connected: 2", res)
        self.assertIn("Peer 1", res)
        self.assertIn("1025", res)

        # test "nodes verbose" with queued, known, and bad addresses
        args = ['nodes', 'verbose']
        res = CommandShow().execute(args)
        self.assertIn("Addresses in queue: 1", res)
        self.assertIn("Known addresses: 1", res)
        self.assertIn("Bad addresses: 1", res)

        # test "nodes queued" with queued, known, and bad addresses
        args = ['nodes', 'queued']
        res = CommandShow().execute(args)
        self.assertIn("Queued addresses:", res)
        self.assertIn(queued_address, res)

        # test "nodes known" with queued, known, and bad addresses
        args = ['nodes', 'known']
        res = CommandShow().execute(args)
        self.assertIn("Known addresses:", res)
        self.assertIn(known_address, res)

        # test "nodes bad" with queued, known, and bad addresses
        args = ['nodes', 'bad']
        res = CommandShow().execute(args)
        self.assertIn("Bad addresses:", res)
        self.assertIn(bad_address, res)

        nodemgr.reset_for_test()
Ejemplo n.º 13
0
 def test_show_mem(self):
     args = ['mem']
     res = CommandShow().execute(args)
     self.assertTrue(res)
Ejemplo n.º 14
0
class PromptInterface:
    prompt_completer = None
    history = None

    go_on = True

    wallet_loop_deferred = None

    Wallet = None

    _known_things = []

    _commands = [
        CommandWallet(),
        CommandShow(),
        CommandSearch(),
        CommandConfig(),
        CommandSC()
    ]

    _command_descs = [
        desc for c in _commands
        for desc in c.command_descs_with_sub_commands()
    ]

    commands = {
        command.command_desc().command: command
        for command in _commands
    }

    start_height = None
    start_dt = None

    def __init__(self, history_filename=None):
        PromptData.Prompt = self
        if history_filename:
            PromptInterface.history = PromptFileHistory(history_filename)

        self.input_parser = InputParser()
        self.start_height = Blockchain.Default().Height
        self.start_dt = datetime.datetime.utcnow()

    def get_bottom_toolbar(self, cli=None):
        out = []
        try:
            return "[%s] Progress: %s/%s" % (
                settings.net_name, str(Blockchain.Default().Height),
                str(Blockchain.Default().HeaderHeight))
        except Exception as e:
            pass

        return out

    def get_completer(self):
        standard_completions = list({
            word
            for d in self._command_descs for word in d.command.split()
        })  # Use a set to ensure unicity of words
        standard_completions += ['quit', 'help', 'exit']

        if PromptData.Wallet:
            for addr in PromptData.Wallet.Addresses:
                if addr not in self._known_things:
                    self._known_things.append(addr)
            for alias in PromptData.Wallet.NamedAddr:
                if alias.Title not in self._known_things:
                    self._known_things.append(alias.Title)
            for tkn in PromptData.Wallet.GetTokens().values():
                if tkn.symbol not in self._known_things:
                    self._known_things.append(tkn.symbol)

        all_completions = standard_completions + self._known_things

        PromptInterface.prompt_completer = WordCompleter(all_completions)

        return PromptInterface.prompt_completer

    def quit(self):
        print('Shutting down. This may take a bit...')
        self.go_on = False
        PromptData.close_wallet()
        Blockchain.Default().Dispose()
        NodeLeader.Instance().Shutdown()
        reactor.stop()

    def help(self):
        prompt_print(f"\nCommands:")
        for command_group in sorted(self.commands.keys()):
            command = self.commands[command_group]
            prompt_print(
                f"   {command_group:<15} - {command.command_desc().short_help}"
            )
        prompt_print(
            f"\nRun 'COMMAND help' for more information on a command.")

    def start_wallet_loop(self):
        if self.wallet_loop_deferred:
            self.stop_wallet_loop()
        self.walletdb_loop = task.LoopingCall(PromptData.Wallet.ProcessBlocks)
        self.wallet_loop_deferred = self.walletdb_loop.start(1)
        self.wallet_loop_deferred.addErrback(self.on_looperror)

    def stop_wallet_loop(self):
        self.wallet_loop_deferred.cancel()
        self.wallet_loop_deferred = None
        if self.walletdb_loop and self.walletdb_loop.running:
            self.walletdb_loop.stop()

    def on_looperror(self, err):
        logger.debug("On DB loop error! %s " % err)

    def run(self):
        dbloop = task.LoopingCall(Blockchain.Default().PersistBlocks)
        dbloop_deferred = dbloop.start(.1)
        dbloop_deferred.addErrback(self.on_looperror)

        tokens = [("class:neo", 'NEO'), ("class:default", ' cli. Type '),
                  ("class:command", '\'help\' '),
                  ("class:default", 'to get started')]

        print_formatted_text(FormattedText(tokens), style=token_style)

        print('\n')

        while self.go_on:

            session = PromptSession(
                "neo> ",
                completer=self.get_completer(),
                history=self.history,
                bottom_toolbar=self.get_bottom_toolbar,
                style=token_style,
                refresh_interval=3,
            )

            try:
                result = session.prompt()
            except EOFError:
                # Control-D pressed: quit
                return self.quit()
            except KeyboardInterrupt:
                # Control-C pressed: do nothing
                continue
            except Exception as e:
                logger.error("Exception handling input: %s " % e)

            try:
                command, arguments = self.input_parser.parse_input(result)

                if command is not None and len(command) > 0:
                    command = command.lower()

                    if command in self.commands:
                        cmd = self.commands[command]

                        if len(arguments) > 0 and arguments[-1] == 'help':
                            cmd.handle_help(arguments)
                        else:
                            cmd.execute(arguments)
                    else:
                        if command == 'quit' or command == 'exit':
                            self.quit()
                        elif command == 'help':
                            self.help()
                        elif command is None:
                            print("Please specify a command")
                        else:
                            print("Command '%s' not found" % command)

            except Exception as e:

                print("Could not execute command: %s" % e)
                traceback.print_stack()
                traceback.print_exc()
Ejemplo n.º 15
0
class PromptInterface:
    prompt_completer = None
    history = None

    go_on = True

    wallet_loop_deferred = None

    Wallet = None

    _known_things = []

    _commands = [
        CommandWallet(),
        CommandShow(),
        CommandSearch(),
        CommandConfig(),
        CommandSC()
    ]

    _command_descs = [
        desc for c in _commands
        for desc in c.command_descs_with_sub_commands()
    ]

    commands = {
        command.command_desc().command: command
        for command in _commands
    }

    start_height = None
    start_dt = None

    prompt_session = None

    def __init__(self, history_filename=None):
        PromptData.Prompt = self
        if history_filename:
            PromptInterface.history = PromptFileHistory(history_filename)

        self.input_parser = InputParser()
        self.start_height = Blockchain.Default().Height
        self.start_dt = datetime.datetime.utcnow()

    def get_bottom_toolbar(self, cli=None):
        out = []
        try:
            if PromptData.Wallet is None:
                return "[%s] Progress: 0/%s/%s" % (
                    settings.net_name, str(Blockchain.Default().Height),
                    str(Blockchain.Default().HeaderHeight))
            else:
                return "[%s] Progress: %s/%s/%s" % (
                    settings.net_name, str(PromptData.Wallet._current_height),
                    str(Blockchain.Default().Height),
                    str(Blockchain.Default().HeaderHeight))
        except Exception as e:
            pass

        return out

    def get_completer(self):
        standard_completions = list({
            word
            for d in self._command_descs for word in d.command.split()
        })  # Use a set to ensure unicity of words
        standard_completions += ['quit', 'help', 'exit']

        if PromptData.Wallet:
            for addr in PromptData.Wallet.Addresses:
                if addr not in self._known_things:
                    self._known_things.append(addr)
            for alias in PromptData.Wallet.NamedAddr:
                if alias.Title not in self._known_things:
                    self._known_things.append(alias.Title)
            for tkn in PromptData.Wallet.GetTokens().values():
                if tkn.symbol not in self._known_things:
                    self._known_things.append(tkn.symbol)

        all_completions = standard_completions + self._known_things

        PromptInterface.prompt_completer = WordCompleter(all_completions)

        return PromptInterface.prompt_completer

    def quit(self):
        print('Shutting down. This may take a bit...')
        self.go_on = False
        PromptData.close_wallet()
        raise SystemExit

    def help(self):
        prompt_print(f"\nCommands:")
        for command_group in sorted(self.commands.keys()):
            command = self.commands[command_group]
            prompt_print(
                f"   {command_group:<15} - {command.command_desc().short_help}"
            )
        prompt_print(
            f"\nRun 'COMMAND help' for more information on a command.")

    def on_looperror(self, err):
        logger.debug("On DB loop error! %s " % err)

    async def run(self):
        nodemgr = NodeManager()
        while not nodemgr.running:
            await asyncio.sleep(0.1)

        tokens = [("class:neo", 'NEO'), ("class:default", ' cli. Type '),
                  ("class:command", '\'help\' '),
                  ("class:default", 'to get started')]

        print_formatted_text(FormattedText(tokens), style=token_style)

        print('\n')

        session = PromptSession(
            "neo> ",
            completer=self.get_completer(),
            history=self.history,
            bottom_toolbar=self.get_bottom_toolbar,
            style=token_style,
            refresh_interval=3,
        )
        self.prompt_session = session
        result = ""

        while self.go_on:
            # with patch_stdout():
            try:
                result = await session.prompt(async_=True)
            except EOFError:
                # Control-D pressed: quit
                return self.quit()
            except KeyboardInterrupt:
                # Control-C pressed: pause for user input

                # temporarily mute stdout during user input
                # components like `network` set at DEBUG level will spam through the console
                # making it impractical to input user data
                log_manager.mute_stdio()

                print('Logging output muted during user input...')
                try:
                    result = await session.prompt(async_=True)
                except Exception as e:
                    logger.error("Exception handling input: %s " % e)

                # and re-enable stdio
                log_manager.unmute_stdio()
            except Exception as e:
                logger.error("Exception handling input: %s " % e)

            try:
                command, arguments = self.input_parser.parse_input(result)

                if command is not None and len(command) > 0:
                    command = command.lower()

                    if command in self.commands:
                        cmd = self.commands[command]

                        if len(arguments) > 0 and arguments[-1] == 'help':
                            cmd.handle_help(arguments)
                        else:
                            cmd.execute(arguments)
                    else:
                        if command == 'quit' or command == 'exit':
                            self.quit()
                        elif command == 'help':
                            self.help()
                        elif command is None:
                            print("Please specify a command")
                        else:
                            print("Command '%s' not found" % command)

            except Exception as e:

                print("Could not execute command: %s" % e)
                traceback.print_stack()
                traceback.print_exc()