QCoDeS

0.57.0 verified Mon Apr 27 auth: no python

Python-based data acquisition framework developed by the Copenhagen / Delft / Sydney / Microsoft quantum computing consortium. Current version: 0.57.0. Active development with monthly releases.

pip install qcodes

Common errors

error ModuleNotFoundError: No module named 'qcodes.station' ↓

cause Station is not in qcodes.station, it is at top-level.

fix

Use from qcodes import Station

error DeprecationWarning: Passing arguments as positional arguments is deprecated. ↓

cause Using positional arguments beyond 'name' in Parameter subclasses, deprecated since 0.56.0.

fix

Use keyword arguments: Parameter('voltage', set_cmd=None, get_cmd=None)

error ImportError: cannot import name 'AlazarTech_ATS9360' from 'qcodes.instrument_drivers.AlazarTech' ↓

cause Old class name removed in 0.57.0.

fix

Use AlazarTechATS9360 from same module.

Warnings

breaking Python 3.10 support dropped in 0.53.0. ↓

fix Use Python >=3.11.

breaking Deprecated class names in instrument_drivers removed or renamed in 0.57.0. Underscore-based aliases like AlazarTech_ATS9360 removed. ↓

fix Use camelCase names, e.g., AlazarTechATS9360.

breaking Positional arguments for Parameter and subclasses deprecated in 0.56.0. ↓

fix Use keyword arguments for all except 'name'.

gotcha Incorrect import path for Station, Parameter, Instrument leads to AttributeError or import errors. ↓

fix Import from qcodes directly: from qcodes import Station

Imports

Station

wrong

from qcodes.station import Station

correct

from qcodes import Station

Station is at top-level, not in submodule.

Parameter

wrong

from qcodes.parameter import Parameter

correct

from qcodes import Parameter

Parameter is re-exported at top-level.

Instrument

wrong

from qcodes.instrument import Instrument

correct

from qcodes import Instrument

Instrument is at top-level.

AlazarTechATS9360

wrong

from qcodes.instrument_drivers.AlazarTech import AlazarTech_ATS9360

correct

from qcodes.instrument_drivers.AlazarTech import AlazarTechATS9360

Old class name deprecated in 0.57.0.

Quickstart

Minimal example creating a parameter and station.

from qcodes import Station, Parameter
import os
# Define a dummy parameter for testing
p = Parameter('voltage', set_cmd=None, get_cmd=None)
station = Station(p)
station.snapshot()