from __future__ import annotations
import logging
import sys
import time
from typing import TYPE_CHECKING, cast
import numpy as np
from opentelemetry import trace
from tqdm.auto import tqdm
from qcodes import config
from qcodes.dataset.descriptions.detect_shapes import detect_shape_of_measurement
from qcodes.dataset.dond.do_nd_utils import (
BreakConditionInterrupt,
_handle_plotting,
_register_actions,
_register_parameters,
_set_write_period,
catch_interrupts,
)
from qcodes.dataset.measurements import Measurement
from qcodes.dataset.threading import (
SequentialParamsCaller,
ThreadPoolParamsCaller,
process_params_meas,
)
from qcodes.parameters import ParameterBase
LOG = logging.getLogger(__name__)
TRACER = trace.get_tracer(__name__)
if TYPE_CHECKING:
from collections.abc import Sequence
from qcodes.dataset.descriptions.versioning.rundescribertypes import Shapes
from qcodes.dataset.dond.do_nd_utils import (
ActionsT,
AxesTupleListWithDataSet,
BreakConditionT,
ParamMeasT,
)
from qcodes.dataset.experiment_container import Experiment
[docs]
@TRACER.start_as_current_span("qcodes.dataset.do2d")
def do2d(
param_set1: ParameterBase,
start1: float,
stop1: float,
num_points1: int,
delay1: float,
param_set2: ParameterBase,
start2: float,
stop2: float,
num_points2: int,
delay2: float,
*param_meas: ParamMeasT,
set_before_sweep: bool | None = True,
enter_actions: ActionsT = (),
exit_actions: ActionsT = (),
before_inner_actions: ActionsT = (),
after_inner_actions: ActionsT = (),
write_period: float | None = None,
measurement_name: str = "",
exp: Experiment | None = None,
flush_columns: bool = False,
do_plot: bool | None = None,
use_threads: bool | None = None,
additional_setpoints: Sequence[ParameterBase] = tuple(),
show_progress: bool | None = None,
log_info: str | None = None,
break_condition: BreakConditionT | None = None,
) -> AxesTupleListWithDataSet:
"""
Perform a 1D scan of ``param_set1`` from ``start1`` to ``stop1`` in
``num_points1`` and ``param_set2`` from ``start2`` to ``stop2`` in
``num_points2`` measuring param_meas at each step.
Args:
param_set1: The QCoDeS parameter to sweep over in the outer loop
start1: Starting point of sweep in outer loop
stop1: End point of sweep in the outer loop
num_points1: Number of points to measure in the outer loop
delay1: Delay after setting parameter in the outer loop
param_set2: The QCoDeS parameter to sweep over in the inner loop
start2: Starting point of sweep in inner loop
stop2: End point of sweep in the inner loop
num_points2: Number of points to measure in the inner loop
delay2: Delay after setting parameter before measurement is performed
param_meas: Parameter(s) to measure at each step or functions that
will be called at each step. The function should take no arguments.
The parameters and functions are called in the order they are
supplied.
set_before_sweep: if True the outer parameter is set to its first value
before the inner parameter is swept to its next value.
enter_actions: A list of functions taking no arguments that will be
called before the measurements start
exit_actions: A list of functions taking no arguments that will be
called after the measurements ends
before_inner_actions: Actions executed before each run of the inner loop
after_inner_actions: Actions executed after each run of the inner loop
write_period: The time after which the data is actually written to the
database.
measurement_name: Name of the measurement. This will be passed down to
the dataset produced by the measurement. If not given, a default
value of 'results' is used for the dataset.
exp: The experiment to use for this measurement.
flush_columns: The data is written after a column is finished
independent of the passed time and write period.
additional_setpoints: A list of setpoint parameters to be registered in
the measurement but not scanned.
do_plot: should png and pdf versions of the images be saved after the
run. If None the setting will be read from ``qcodesrc.json``
use_threads: If True measurements from each instrument will be done on
separate threads. If you are measuring from several instruments
this may give a significant speedup.
show_progress: should a progress bar be displayed during the
measurement. If None the setting will be read from ``qcodesrc.json``
log_info: Message that is logged during the measurement. If None a default
message is used.
break_condition: Callable that takes no arguments. If returned True,
measurement is interrupted.
Returns:
The QCoDeS dataset.
"""
if do_plot is None:
do_plot = cast(bool, config.dataset.dond_plot)
if show_progress is None:
show_progress = config.dataset.dond_show_progress
meas = Measurement(name=measurement_name, exp=exp)
if log_info is not None:
meas._extra_log_info = log_info
else:
meas._extra_log_info = "Using 'qcodes.dataset.do2d'"
all_setpoint_params = (
param_set1,
param_set2,
) + tuple(s for s in additional_setpoints)
measured_parameters = tuple(
param for param in param_meas if isinstance(param, ParameterBase)
)
try:
loop_shape = (num_points1, num_points2) + tuple(1 for _ in additional_setpoints)
shapes: Shapes | None = detect_shape_of_measurement(
measured_parameters, loop_shape
)
except TypeError:
LOG.exception(
f"Could not detect shape of {measured_parameters} "
f"falling back to unknown shape."
)
shapes = None
_register_parameters(meas, all_setpoint_params)
_register_parameters(meas, param_meas, setpoints=all_setpoint_params, shapes=shapes)
_set_write_period(meas, write_period)
_register_actions(meas, enter_actions, exit_actions)
if use_threads is None:
use_threads = config.dataset.use_threads
param_meas_caller = (
ThreadPoolParamsCaller(*param_meas)
if use_threads
else SequentialParamsCaller(*param_meas)
)
with catch_interrupts() as interrupted, meas.run() as datasaver, param_meas_caller as call_param_meas:
dataset = datasaver.dataset
additional_setpoints_data = process_params_meas(additional_setpoints)
setpoints1 = np.linspace(start1, stop1, num_points1)
for set_point1 in tqdm(setpoints1, disable=not show_progress):
if set_before_sweep:
param_set2.set(start2)
param_set1.set(set_point1)
for action in before_inner_actions:
action()
time.sleep(delay1)
setpoints2 = np.linspace(start2, stop2, num_points2)
# flush to prevent unflushed print's to visually interrupt tqdm bar
# updates
sys.stdout.flush()
sys.stderr.flush()
for set_point2 in tqdm(setpoints2, disable=not show_progress, leave=False):
# skip first inner set point if `set_before_sweep`
if set_point2 == start2 and set_before_sweep:
pass
else:
param_set2.set(set_point2)
time.sleep(delay2)
datasaver.add_result(
(param_set1, set_point1),
(param_set2, set_point2),
*call_param_meas(),
*additional_setpoints_data,
)
if callable(break_condition):
if break_condition():
raise BreakConditionInterrupt("Break condition was met.")
for action in after_inner_actions:
action()
if flush_columns:
datasaver.flush_data_to_database()
return _handle_plotting(dataset, do_plot, interrupted())