def resolve_parameter_identifier(instrument: InstrumentBase,
identifier: str) -> Parameter:
parts = identifier.split('.')
try:
for level in parts[:-1]:
instrument = checked_getattr(instrument, level,
InstrumentBase)
except TypeError:
raise RuntimeError(
f'Cannot resolve `{level}` in {identifier} to an '
f'instrument/channel for base instrument '
f'{instrument!r}.')
try:
return checked_getattr(instrument, parts[-1], Parameter)
except TypeError:
raise RuntimeError(
f'Cannot resolve parameter identifier `{identifier}` to '
f'a parameter on instrument {instrument!r}.')
def resolve_parameter_identifier(instrument: ChannelOrInstrumentBase,
identifier: str) -> _BaseParameter:
parts = identifier.split('.')
if len(parts) > 1:
instrument = resolve_instrument_identifier(
instrument, '.'.join(parts[:-1]))
try:
return checked_getattr(instrument, parts[-1], _BaseParameter)
except TypeError:
raise RuntimeError(
f'Cannot resolve parameter identifier `{identifier}` to '
f'a parameter on instrument {instrument!r}.')
def resolve_instrument_identifier(
instrument: ChannelOrInstrumentBase,
identifier: str) -> ChannelOrInstrumentBase:
"""
Get the instrument, channel or channel_list described by a nested
string.
E.g: 'dac.ch1' will return the instance of ch1.
"""
try:
for level in identifier.split('.'):
instrument = checked_getattr(instrument, level,
(InstrumentBase, ChannelList))
except TypeError:
raise RuntimeError(
f'Cannot resolve `{level}` in {identifier} to an '
f'instrument/channel for base instrument '
f'{instrument!r}.')
return instrument
