.. highlight:: python
   :linenothreshold: 4

.. _itango:

======
ITango
======

ITango is a PyTango CLI based on IPython_. It is designed to be used as an
IPython profile.

ITango is available since PyTango 7.1.2

You can start ITango by typing on the command line::

    $ itango

or the equivalent::

    $ ipython --profile=tango

and you should get something like this:

.. image:: _static/itango00.png
    :align: center
    :width: 75%


.. _itango-features:

Features
--------

ITango works like a normal python console, but it gives you in addition a nice
set of features from IPython_ like:

    - proper (bash-like) command completion
    - automatic expansion of python variables, functions, types
    - command history (with up/down arrow keys, %hist command)
    - help system ( object? syntax, help(object))
    - persistently store your favorite variables
    - color modes
 
(for a complete list checkout the `IPython web page <http://ipython.org/>`_)

Plus an additional set o Tango_ specific features:

    - automatic import of Tango objects to the console namespace (:mod:`PyTango`
      module, :class:`~PyTango.DeviceProxy` (=Device),
      :class:`~PyTango.Database`, :class:`~PyTango.Group`
      and :class:`~PyTango.AttributeProxy` (=Attribute))
    - device name completion
    - attribute name completion
    - automatic tango object member completion
    - list tango devices, classes, servers
    - customized tango error message
    - tango error introspection
    - switch database
    - refresh database
    - list tango devices, classes
    - store favorite tango objects
    - store favorite tango devices
    - tango color modes

Check the :ref:`itango-highlights` to see how to put these feature to good use
:-)


.. currentmodule:: PyTango

.. _itango-highlights:

Highlights
----------

Tab completion
~~~~~~~~~~~~~~

ITango exports many tango specific objects to the console namespace.
These include:

    - the PyTango module itself
      
      .. sourcecode:: itango

            ITango [1]: PyTango
            Result [1]: <module 'PyTango' from ...>
                         
    - The :class:`DeviceProxy` (=Device), :class:`AttributeProxy` (=Attribute),
      :class:`Database` and :class:`Group` classes
      
      .. sourcecode:: itango

            ITango [1]: De<tab>
            DeprecationWarning            Device       DeviceProxy

            ITango [2]: Device
            Result [2]: <class 'PyTango._PyTango.DeviceProxy'>
            
            ITango [3]: Device("sys/tg_test/1")
            Result [3]: DeviceProxy(sys/tg_test/1)
                         
            ITango [4]: Datab<tab>
            
            ITango [4]: Database
            
            ITango [4]: Att<tab>
            Attribute       AttributeError  AttributeProxy
            
    - The Tango :class:`Database` object to which the itango session is 
      currently connected
      
      .. sourcecode:: itango

            ITango [1]: db
            Result [1]: Database(homer, 10000)
    
Device name completion
~~~~~~~~~~~~~~~~~~~~~~

ITango knows the complete list of device names (including alias) for the current
tango database. This means that when you try to create a new Device, by pressing
<tab> you can see a context sensitive list of devices.

.. sourcecode:: itango

    ITango [1]: test = Device("<tab>
    Display all 3654 possibilities? (y or n) n
    
    ITango [1]: test = Device("sys<tab>
    sys/access_control/1  sys/database/2        sys/tautest/1         sys/tg_test/1
    
    ITango [2]: test = Device("sys/tg_test/1")

Attribute name completion
~~~~~~~~~~~~~~~~~~~~~~~~~

ITango can inspect the list of attributes in case the device server for the device
where the attribute resides is running.

.. sourcecode:: itango

    ITango [1]: short_scalar = Attribute("sys<tab>
    sys/access_control/1/  sys/database/2/        sys/tautest/1/         sys/tg_test/1/
    
    ITango [1]: short_scalar = Attribute("sys/tg_test/1/<tab>
    sys/tg_test/1/State                sys/tg_test/1/no_value
    sys/tg_test/1/Status               sys/tg_test/1/short_image
    sys/tg_test/1/ampli                sys/tg_test/1/short_image_ro
    sys/tg_test/1/boolean_image        sys/tg_test/1/short_scalar
    sys/tg_test/1/boolean_image_ro     sys/tg_test/1/short_scalar_ro
    sys/tg_test/1/boolean_scalar       sys/tg_test/1/short_scalar_rww
    sys/tg_test/1/boolean_spectrum     sys/tg_test/1/short_scalar_w
    sys/tg_test/1/boolean_spectrum_ro  sys/tg_test/1/short_spectrum
    sys/tg_test/1/double_image         sys/tg_test/1/short_spectrum_ro
    sys/tg_test/1/double_image_ro      sys/tg_test/1/string_image
    sys/tg_test/1/double_scalar        sys/tg_test/1/string_image_ro
    ...

    ITango [1]: short_scalar = Attribute("sys/tg_test/1/short_scalar")
    
    ITango [29]: print test.read()
    DeviceAttribute[
    data_format = PyTango._PyTango.AttrDataFormat.SCALAR
      dim_x = 1
      dim_y = 0
    has_failed = False
    is_empty = False
       name = 'short_scalar'
    nb_read = 1
    nb_written = 1
    quality = PyTango._PyTango.AttrQuality.ATTR_VALID
    r_dimension = AttributeDimension(dim_x = 1, dim_y = 0)
       time = TimeVal(tv_nsec = 0, tv_sec = 1279723723, tv_usec = 905598)
       type = PyTango._PyTango.CmdArgType.DevShort
      value = 47
    w_dim_x = 1
    w_dim_y = 0
    w_dimension = AttributeDimension(dim_x = 1, dim_y = 0)
    w_value = 0]

Automatic tango object member completion
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

When you create a new tango object, (ex.: a device), itango is able to find out
dynamically which are the members of this device (including tango commands 
and attributes if the device is currently running)

.. sourcecode:: itango

    ITango [1]: test = Device("sys/tg_test/1")
    
    ITango [2]: test.<tab>
    Display all 240 possibilities? (y or n)
    ...
    test.DevVoid                            test.get_access_control
    test.Init                               test.get_asynch_replies
    test.State                              test.get_attribute_config
    test.Status                             test.get_attribute_config_ex
    test.SwitchStates                       test.get_attribute_list
    ...
    
    ITango [2]: test.short_<tab>
    test.short_image        test.short_scalar       test.short_scalar_rww   test.short_spectrum
    test.short_image_ro     test.short_scalar_ro    test.short_scalar_w     test.short_spectrum_ro

    ITango [2]: test.short_scalar        # old style: test.read_attribute("short_scalar").value
    Result [2]: 252

    ITango [3]: test.Dev<tab>
    test.DevBoolean               test.DevUShort                test.DevVarShortArray
    test.DevDouble                test.DevVarCharArray          test.DevVarStringArray
    test.DevFloat                 test.DevVarDoubleArray        test.DevVarULongArray
    test.DevLong                  test.DevVarDoubleStringArray  test.DevVarUShortArray
    test.DevShort                 test.DevVarFloatArray         test.DevVoid
    test.DevString                test.DevVarLongArray          
    test.DevULong                 test.DevVarLongStringArray
    
    ITango [3]: test.DevDouble(56.433)  # old style: test.command_inout("DevDouble").
    Result [3]: 56.433

Tango classes as :class:`DeviceProxy`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

ITango exports all known tango classes as python alias to :class:`DeviceProxy`. 
This way, if you want to create a device of class which you already know 
(say, Libera, for example) you can do:

.. sourcecode:: itango

    ITango [1]: lib01 = Libera("BO01/DI/BPM-01")

One great advantage is that the tango device name completion is sensitive to the
type of device you want to create. This means that if you are in the middle of
writting a device name and you press the <tab> key, only devices of the tango
class 'Libera' will show up as possible completions.

.. sourcecode:: itango

    ITango [1]: bpm1 = Libera("<tab>
    BO01/DI/BPM-01  BO01/DI/BPM-09  BO02/DI/BPM-06  BO03/DI/BPM-03  BO03/DI/BPM-11  BO04/DI/BPM-08
    BO01/DI/BPM-02  BO01/DI/BPM-10  BO02/DI/BPM-07  BO03/DI/BPM-04  BO04/DI/BPM-01  BO04/DI/BPM-09
    BO01/DI/BPM-03  BO01/DI/BPM-11  BO02/DI/BPM-08  BO03/DI/BPM-05  BO04/DI/BPM-02  BO04/DI/BPM-10
    BO01/DI/BPM-04  BO02/DI/BPM-01  BO02/DI/BPM-09  BO03/DI/BPM-06  BO04/DI/BPM-03  BO04/DI/BPM-11
    BO01/DI/BPM-05  BO02/DI/BPM-02  BO02/DI/BPM-10  BO03/DI/BPM-07  BO04/DI/BPM-04  
    BO01/DI/BPM-06  BO02/DI/BPM-03  BO02/DI/BPM-11  BO03/DI/BPM-08  BO04/DI/BPM-05  
    BO01/DI/BPM-07  BO02/DI/BPM-04  BO03/DI/BPM-01  BO03/DI/BPM-09  BO04/DI/BPM-06  
    BO01/DI/BPM-08  BO02/DI/BPM-05  BO03/DI/BPM-02  BO03/DI/BPM-10  BO04/DI/BPM-07

    ITango [1]: bpm1 = Libera("BO01<tab>
    BO01/DI/BPM-01  BO01/DI/BPM-03  BO01/DI/BPM-05  BO01/DI/BPM-07  BO01/DI/BPM-09  BO01/DI/BPM-11
    BO01/DI/BPM-02  BO01/DI/BPM-04  BO01/DI/BPM-06  BO01/DI/BPM-08  BO01/DI/BPM-10
    
    ITango [1]: bpm1 = Libera("BO01/DI/BPM-01")

Customized device representation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

When you use ipython >= 0.11 with a Qt console frontend::

    $ itango qtconsole
    
typing a variable containing a tango device object followend by :kbd:`Enter`
will present you with a customized representation of the object instead of the
usual :func:`repr` :

    .. image:: _static/itango06.png

You can customize the icon that itango displays for a specific device.
The first thing to do is to copy the image file into
:mod:`PyTango.ipython.resource` installation directory (if you don't have
permissions to do so, copy the image into a directory of your choosing
and make sure it is accessible from itango).

If you want to use the image for all devices of a certain tango class, just
add a new tango class property called *__icon*. You can do it with jive or, of
course, with itango itself::

    db.put_class_property("Libera", dict(__icon="libera.png"))
    
    # if you placed your image in a directory different than PyTango.ipython.resource
    # then, instead you have to specify the absolute directory
    
    db.put_class_property("Libera", dict(__icon="/home/homer/.config/itango/libera.png"))

If you need different images for different devices of the same class, you can
specify an *__icon* property at the device level (which takes precedence over
the class property value, if defined)::

    db.put_device_property("BO01/DI/BPM-01", dict(__icon="libera2.png"))



List tango devices, classes, servers
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

ITango provides a set of magic functions (ipython lingo) that allow you to check
for the list tango devices, classes and servers which are registered in the 
current database.

.. sourcecode:: itango

    ITango [1]: lsdev
                                      Device                     Alias                    Server                Class
    ---------------------------------------- ------------------------- ------------------------- --------------------
                  expchan/BL99_Dummy0DCtrl/1                  BL99_0D1                 Pool/BL99      ZeroDExpChannel
                      simulator/bl98/motor08                                      Simulator/BL98            SimuMotor
                  expchan/BL99_Dummy0DCtrl/3                  BL99_0D3                 Pool/BL99      ZeroDExpChannel
                  expchan/BL99_Dummy0DCtrl/2                  BL99_0D2                 Pool/BL99      ZeroDExpChannel
                  expchan/BL99_Dummy0DCtrl/5                  BL99_0D5                 Pool/BL99      ZeroDExpChannel
                  expchan/BL99_Dummy0DCtrl/4                  BL99_0D4                 Pool/BL99      ZeroDExpChannel
                  expchan/BL99_Dummy0DCtrl/7                  BL99_0D7                 Pool/BL99      ZeroDExpChannel
                  expchan/BL99_Dummy0DCtrl/6                  BL99_0D6                 Pool/BL99      ZeroDExpChannel
                      simulator/bl98/motor01                                      Simulator/BL98            SimuMotor
                      simulator/bl98/motor02                                      Simulator/BL98            SimuMotor
                      simulator/bl98/motor03                                      Simulator/BL98            SimuMotor
       mg/BL99/_mg_macserv_26065_-1320158352                                           Pool/BL99           MotorGroup
                      simulator/bl98/motor05                                      Simulator/BL98            SimuMotor
                      simulator/bl98/motor06                                      Simulator/BL98            SimuMotor
                      simulator/bl98/motor07                                      Simulator/BL98            SimuMotor
                    simulator/BL98/motctrl01                                      Simulator/BL98        SimuMotorCtrl
                  expchan/BL99_Simu0DCtrl1/1                  BL99_0D8                 Pool/BL99      ZeroDExpChannel
                 expchan/BL99_UxTimerCtrl1/1                BL99_Timer                 Pool/BL99         CTExpChannel
    ...
    
    ITango [1]: lsdevclass
    SimuCoTiCtrl                   TangoAccessControl             ZeroDExpChannel
    Door                           Motor                          DataBase
    MotorGroup                     IORegister                     SimuMotorCtrl
    TangoTest                      MacroServer                    TauTest
    SimuMotor                      SimuCounterEx                  MeasurementGroup
    Pool                           CTExpChannel

    ITango [1]: lsserv
    MacroServer/BL99               MacroServer/BL98               Pool/V2
    Pool/BL99                      Pool/BL98                      TangoTest/test
    Pool/tcoutinho                 Simulator/BL98
    TangoAccessControl/1           TauTest/tautest                DataBaseds/2
    MacroServer/tcoutinho          Simulator/BL99

Customized tango error message and introspection
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

ITango intercepts tango exceptions that occur when you do tango operations 
(ex.: write an attribute with a value outside the allowed limits) and tries to
display it in a summarized, user friendly way.
If you need more detailed information about the last tango error, you can use
the magic command 'tango_error'.

.. sourcecode:: itango

    ITango [1]: test = Device("sys/tg_test/1")

    ITango [2]: test.no_value
    API_AttrValueNotSet : Read value for attribute no_value has not been updated
    For more detailed information type: tango_error

    ITango [3]: tango_error
    Last tango error:
    DevFailed[
    DevError[
        desc = 'Read value for attribute no_value has not been updated'
      origin = 'Device_3Impl::read_attributes_no_except'
      reason = 'API_AttrValueNotSet'
    severity = PyTango._PyTango.ErrSeverity.ERR]
    DevError[
        desc = 'Failed to read_attribute on device sys/tg_test/1, attribute no_value'
      origin = 'DeviceProxy::read_attribute()'
      reason = 'API_AttributeFailed'
    severity = PyTango._PyTango.ErrSeverity.ERR]]

Switching database
~~~~~~~~~~~~~~~~~~

You can switch database simply by executing the 'switchdb <host> [<port>]' magic
command.

.. sourcecode:: itango

    ITango [1]: switchdb

    Must give new database name in format <host>[:<port>].
    <port> is optional. If not given it defaults to 10000.

    Examples:
    switchdb homer:10005
    switchdb homer 10005
    switchdb homer
    
    ITango [2]: db
    Database(homer, 10000)
    
    ITango [3]: switchdb bart       # by default port is 10000
    
    ITango [4]: db
    Database(bart, 10000)
    
    ITango [5]: switchdb lisa 10005  # you can use spaces between host and port
    
    ITango [6]: db
    Database(lisa, 10005)

    ITango [7]: switchdb marge:10005   # or the traditional ':'

    ITango [8]: db
    Database(marge, 10005)

Refreshing the database
~~~~~~~~~~~~~~~~~~~~~~~

When itango starts up or when the database is switched, a query is made to the
tango Database device server which provides all necessary data. This
data is stored locally in a itango cache which is used to provide all the nice 
features.
If the Database server is changed in some way (ex: a new device server is registered),
the local database cache is not consistent anymore with the tango database.
Therefore, itango provides a magic command 'refreshdb' that allows you to reread
all tango information from the database.

.. sourcecode:: itango

    ITango [1]: refreshdb
    
Storing your favorite tango objects for later usage
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. note::
    This feature is not available if you have installed IPython 0.11!

Since version 7.1.2, :class:`DeviceProxy`, :class:`AttributeProxy` and 
:class:`Database` became pickable.
This means that they can be used by the IPython_ 'store' magic command (type
'store?' on the itango console to get information on how to use this command).
You can, for example, assign your favorite devices in local python variables and
then store these for the next time you startup IPython_ with itango profile.

.. sourcecode:: itango

    ITango [1]: theta = Motor("BL99_M1")  # notice how we used tango alias
    
    ITango [2]: store theta
    Stored 'theta' (DeviceProxy)
    
    ITango [3]: Ctrl+D
    
    (IPython session is closed and started again...)

    ITango [1]: store -r # in some versions of IPython you may need to do this ...
    
    ITango [1]: print theta
    DeviceProxy(motor/bl99/1)

Adding itango to your own ipython profile
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Adding itango to the ipython default profile
##################################################

Let's assume that you find itango so useful that each time you start ipython, you want
itango features to be loaded by default.
The way to do this is by editing your default ipython configuration file: 

1. On IPython <= 0.10

    $HOME/.ipython/ipy_user_conf.py and add the lines 1 and 7.

    .. note::
        The code shown below is a small part of your $HOME/.ipython/ipy_user_conf.py.
        It is shown here only the relevant part for this example.

    .. sourcecode:: python

        import PyTango.ipython

        def main():

            # uncomment if you want to get ipython -p sh behaviour
            # without having to use command line switches  
            # import ipy_profile_sh
            PyTango.ipython.init_ipython(ip, console=False)

2. On IPython > 0.10

    First you have to check which is the configuration directory being used by
    IPython. For this, in an IPython console type:
    
    .. sourcecode:: itango

        ITango [1]: import IPython.utils.path
        
        ITango [2]: IPython.utils.path.get_ipython_dir()
        <IPYTHON_DIR>

    now edit <IPYTHON_DIR>/profile_default/ipython_config.py and add the
    following line at the end to add itango configuration::
    
        load_subconfig('ipython_config.py', profile='tango')
    
    Alternatively, you could also load itango as an IPython extension::
        
        config = get_config()
        i_shell_app = config.InteractiveShellApp
        extensions = getattr(i_shell_app, 'extensions', [])
        extensions.append('PyTango.ipython')
        i_shell_app.extensions = extensions
    
    for more information on how to configure IPython >= 0.11 please check the
    `IPython configuration <http://ipython.org/ipython-doc/dev/config/ipython.html#configuring-the-ipython-command-line-application>`_
    
And now, every time you start ipython::

    ipython

itango features will also be loaded.

.. sourcecode:: ipython

    In [1]: db
    Out[1]: Database(homer, 10000)


Adding itango to an existing customized profile
####################################################

.. note::
    This chapter has a pending update. The contents only apply to
    IPython <= 0.10.

If you have been working with IPython_ before and have already defined a
customized personal profile, you can extend your profile with itango features 
without breaking your existing options. The trick is to initialize itango extension
with a parameter that tells itango to maintain the existing options (like colors,
command line and initial banner).

So, for example, let's say you have created a profile called nuclear, and therefore
you have a file called $HOME/.ipython/ipy_profile_nuclear.py with the following
contents:

.. sourcecode:: python

    import os
    import IPython.ipapi

    def main():
        ip = IPython.ipapi.get()
        
        o = ip.options
        o.banner = "Springfield nuclear powerplant CLI\n\nWelcome Homer Simpson"
        o.colors = "Linux"
        o.prompt_in1 = "Mr. Burns owns you [\\#]: "
        
    main()

In order to have itango features available to this profile you simply need to
add two lines of code (lines 3 and 7):

.. sourcecode:: python

    import os
    import IPython.ipapi
    import PyTango.ipython

    def main():
        ip = IPython.ipapi.get()
        PyTango.ipython.init_ipython(ip, console=False)
        
        o = ip.options
        o.banner = "Springfield nuclear powerplant CLI\n\nMr. Burns owns you!"
        o.colors = "Linux"
        o.prompt_in1 = "The Simpsons [\\#]: "
        
    main()

This will load the itango features into your profile while preserving your
profile's console options (like colors, command line and initial banner).

Creating a profile that extends itango profile
####################################################

.. note::
    This chapter has a pending update. The contents only apply to
    IPython <= 0.10.
    
It is also possible to create a profile that includes all itango features and at
the same time adds new ones. Let's suppose that you want to create a customized
profile called 'orbit' that automaticaly exports devices of class 
'Libera' for the booster accelerator (assuming you are working on a synchrotron
like institute ;-).
Here is the code for the $HOME/.ipython/ipy_profile_orbit.py:

.. sourcecode:: python

    import os
    import IPython.ipapi
    import IPython.genutils
    import IPython.ColorANSI
    import PyTango.ipython
    import StringIO

    def magic_liberas(ip, p=''):
        """Lists all known Libera devices."""
        data = PyTango.ipython.get_device_map()
        s = StringIO.StringIO()
        cols = 30, 15, 20
        l = "%{0}s %{1}s %{2}s".format(*cols)
        print >>s, l % ("Device", "Alias", "Server")
        print >>s, l % (cols[0]*"-", cols[1]*"-", cols[2]*"-")
        for d, v in data.items():
            if v[2] != 'Libera': continue
            print >>s, l % (d, v[0], v[1])
        s.seek(0)
        IPython.genutils.page(s.read())

    def main():
        ip = IPython.ipapi.get()

        PyTango.ipython.init_ipython(ip)

        o = ip.options
        
        Colors = IPython.ColorANSI.TermColors
        c = dict(Colors.__dict__)

        o.banner += "\n{Brown}Welcome to Orbit analysis{Normal}\n".format(**c)

        o.prompt_in1 = "Orbit [\\#]: "
        o.colors = "BlueTango"
        
        ip.expose_magic("liberas", magic_liberas)

        db = ip.user_ns.get('db')
        dev_class_dict = PyTango.ipython.get_class_map()

        if not dev_class_dict.has_key("Libera"):
            return
        
        for libera in dev_class_dict['Libera']:
            domain, family, member = libera.split("/")
            var_name = domain + "_" + member
            var_name = var_name.replace("-","_")
            ip.to_user_ns( { var_name : PyTango.DeviceProxy(libera) } )

    main()

Then start your CLI with::

    $ ipython --profile=orbit

and you will have something like this

.. image:: _static/itango02.png

Advanced event monitoring
~~~~~~~~~~~~~~~~~~~~~~~~~

.. note::
    This chapter has a pending update. The contents only apply to
    IPython <= 0.10.

With itango it is possible to monitor change events triggered by any tango
attribute which has events enabled.

To start monitoring the change events of an attribute:

.. sourcecode:: itango

    ITango [1]: mon -a BL99_M1/Position
    'BL99_M1/Position' is now being monitored. Type 'mon' to see all events
    
To list all events that have been intercepted:

.. sourcecode:: itango

    ITango [2]: mon
      ID           Device    Attribute            Value       Quality             Time
    ---- ---------------- ------------ ---------------- ------------- ----------------
       0     motor/bl99/1        state               ON    ATTR_VALID  17:11:08.026472
       1     motor/bl99/1     position            190.0    ATTR_VALID  17:11:20.691112
       2     motor/bl99/1        state           MOVING    ATTR_VALID  17:12:11.858985
       3     motor/bl99/1     position    188.954072857 ATTR_CHANGING  17:12:11.987817
       4     motor/bl99/1     position    186.045533882 ATTR_CHANGING  17:12:12.124448
       5     motor/bl99/1     position    181.295838155 ATTR_CHANGING  17:12:12.260884
       6     motor/bl99/1     position     174.55354729 ATTR_CHANGING  17:12:12.400036
       7     motor/bl99/1     position     166.08870515 ATTR_CHANGING  17:12:12.536387
       8     motor/bl99/1     position     155.77528943 ATTR_CHANGING  17:12:12.672846
       9     motor/bl99/1     position    143.358230136 ATTR_CHANGING  17:12:12.811878
      10     motor/bl99/1     position    131.476140017 ATTR_CHANGING  17:12:12.950391
      11     motor/bl99/1     position    121.555421781 ATTR_CHANGING  17:12:13.087970
      12     motor/bl99/1     position    113.457930987 ATTR_CHANGING  17:12:13.226531
      13     motor/bl99/1     position    107.319423091 ATTR_CHANGING  17:12:13.363559
      14     motor/bl99/1     position    102.928229946 ATTR_CHANGING  17:12:13.505102
      15     motor/bl99/1     position    100.584726495 ATTR_CHANGING  17:12:13.640794
      16     motor/bl99/1     position            100.0    ATTR_ALARM  17:12:13.738136
      17     motor/bl99/1        state            ALARM    ATTR_VALID  17:12:13.743481

    ITango [3]: mon -l mot.* state
      ID           Device    Attribute            Value       Quality             Time
    ---- ---------------- ------------ ---------------- ------------- ----------------
       0     motor/bl99/1        state               ON    ATTR_VALID  17:11:08.026472
       2     motor/bl99/1        state           MOVING    ATTR_VALID  17:12:11.858985
      17     motor/bl99/1        state            ALARM    ATTR_VALID  17:12:13.743481

To stop monitoring the attribute:

.. sourcecode:: itango

    ITango [1]: mon -d BL99_M1/Position
    Stopped monitoring 'BL99_M1/Position'

.. note::
    Type 'mon?' to see detailed information about this magic command


