def isLive(self):
""" Attempts VISA connection to instrument, and checks whether
:meth:`~lightlab.equipment.visa_bases.visa_object.instrID`
matches :data:`id_string`.
Produces a warning if it is live but the id_string is wrong.
Returns:
(bool): True if "live", False otherwise.
"""
try:
driver = self.driver_object
query_id = driver.instrID()
logger.info("Found %s in %s.", self.name, self.address)
if self.id_string is not None:
if self.id_string == query_id:
logger.info("id_string of %s is accurate", self.name)
return True
else:
logger.warning("%s: %s, expected %s", self.address,
query_id, self.id_string)
return False
else:
logger.debug("Cannot authenticate %s in %s.",
self.name, self.address)
return True
except pyvisa.VisaIOError as err:
logger.warning(err)
return False
def is_valid(self, reset=True):
if reset:
self._valid = None
if self._valid is None:
self._valid = self.validate()
# Only print info is it is validated now.
if self._valid:
logger.info("%s was just verified and it is live.", self)
else:
logger.info("%s was just verified and it is offline.", self)
return self._valid
def __contains__(self, item):
if isinstance(item, Instrument):
instrument_search = item in self.instruments
if not instrument_search:
logger.info("%s not found in %s's instruments.", item, self)
return instrument_search
elif isinstance(item, Device):
device_search = item in self.devices
if not device_search:
logger.info("%s not found in %s's devices.", item, self)
return device_search
else:
logger.debug("%s is neither an Instrument nor a Device", item)
return False
def checkInstrumentsLive(self):
""" Checks whether all instruments are "live".
Instrument status is checked with the :meth:`Instrument.isLive` method
Returns:
(bool): True if all instruments are live, False otherwise
"""
all_live = True
for instrument in self.instruments:
if instrument.isLive():
logger.info("%s is live.", instrument)
else:
all_live = False
return all_live
def updateHost(self, *hosts):
""" Updates hosts in the hosts list.
Checks the number of instrumentation_servers.
There should be exactly one.
Args:
*(Host): hosts
Raises:
RuntimeError: Raised if duplicate names are found.
TypeError: Raised if host is not of type :class:`~lightlab.laboratory.instruments.bases.Host`
"""
localhost_name = None
old_hostnames = []
for old_host in self.hosts.values():
old_hostnames.append(old_host.name)
if isinstance(old_host, LocalHost):
if localhost_name is not None:
logger.warning('Duplicate localhost found in lab.hosts')
localhost_name = old_host.name
for new_host in hosts:
# Updating localhost
if (isinstance(new_host, LocalHost)
and localhost_name is not None):
# Check for localhost clash
if new_host.name != localhost_name:
logger.warning(
'Localhost is already present: ' + '%s\n' +
'Not updating host %s!', localhost_name, new_host.name)
continue
else:
localhost_name = new_host.name
# Will an update happen?
if new_host.name in old_hostnames:
logger.info('Overwriting host: %s', new_host.name)
# Will it end up removing the localhost?
if (new_host.name == localhost_name
and not isinstance(new_host, LocalHost)):
localhost_name = None
self.hosts[new_host.name] = new_host
if localhost_name is None:
logger.warning('Localhost not yet present')
def findGpibAddressById(self, id_string_search, use_cached=True):
""" Finds a gpib address using :meth:`get_all_gpib_id`, given
an identity string.
Args:
id_string_search (str): identity string
use_cached (bool): query only if not cached, default True
Returns:
str: address if found.
Raises:
NotFoundError: If the instrument is not found.
"""
gpib_ids = self.get_all_gpib_id(use_cached=use_cached)
for gpib_address, id_string in gpib_ids.items():
if id_string_search == id_string:
logger.info("Found %s in %s.", id_string_search, gpib_address)
return gpib_address
logger.warning("%s not found in %s", id_string_search, self)
raise NotFoundError(
"{} not found in {}".format(id_string_search, self))
def __contains__(self, item):
instrument_search = item in self.instruments
if not instrument_search:
logger.info("%s not found in %s's instruments.", item, self)
return instrument_search
