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0.32.0 - January 2022 (2022-01-24)
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@astafan8 astafan8 released this 24 Jan 16:51
v0.32.0
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Breaking Changes:

  • The qcodes.version module deprecated and no longer imported by default e.g. if you want to use it you will need
    to explicitly import qcodes.version. It is recommended to use qcodes.__version__ as an alternative. (#3762)
  • IPython measurement magic (Special command staring with % for use in IPython) using the legacy
    loop is no longer enabled by default.
    To enable it set the corresponding config value (core.register_magic) in your qcodesrc.json config file to true. (#3764)
  • The import_legacy_api config option has been deprecated and will be removed in a future release. (#3781)

New:

  • An abstract instrument (An instrument with one or more abstract parameters) will now raise at
    instrument creation time preventing such an instrument from being created.
    This makes it easier to define interfaces that multiple instruments must implement.
    See here <../examples/writing_drivers/abstract_instruments.ipynb>__ for examples of how to use
    this. (#3718)

  • Improve the Keithley 2600 SMU calibration routine and make it
    a standalone executable function (#3783)

  • Add ArraySweep sweep class for use with dond function
    for sweeping parameters on arbitrary arrays of values (#3847)

  • The instrument channel container ChannelList has been split into a immutable ChannelTuple
    and a mutable ChannelList. The ChannelList class has gained a to_channel_tuple method.
    The lock method which locks a ChannelList has been retained but we do expect to deprecate
    this in the future.

    All drivers in QCoDeS have been updated to either use a ChannelTuple or a unlocked
    ChannelList as it makes sense.

    Furthermore, the ChannelList class now implements the full
    collections.abc.MutableSequence interface behaving like a python list. (#3851)

Improved:

  • Only register an Instrument in the list of connected instruments if the connection
    was successful. This change allows connections to be retried with the same name
    if the first attempt fails. (#3696)
  • Fixed a bug with import_legacy_api config option which would trigger a circular import error. (#3781)
  • Instances of InstrumentModule (and therfor their subclass InstrumentChannel) are now accessible via
    the Instrument.instrument_modules dict on an instrument in addition to the Instrument.submodules dict
    which combines them with instances of ChannelList. (#3834)
  • ChannelList now implements the full collections.abc.Sequence interface.
    This also means that isinstance(mychannelist, Sequence) is True (#3835)
  • Inserting into a ChannelList now correctly keeps the internal mapping up to date ensuring that
    get_channel_by_name works correctly. (#3838)
  • InstrumentChannel now subclasses a new class InstrumentModule to clarify that instrument modules may
    serve other purposes than being channels. At the moment InstrumentModule and InstrumentChannel are identical.
    The type hints have been updated to clarify that only subclasses of InstrumentModule and ChannelLists
    are allowed submodules. (#3840)
  • Empty ChannelTuples/Lists now correctly raise an attribute error when trying
    to get a non existing attribute. Previously they would raise an IndexError. (#3856)

Improved Drivers:

  • Changed the value mapping of channel_selection on the AlazarTech ATS9440
    driver to fix all the combinations where channel D is involved. (#3802)
  • The VISA version of the AMI driver has been improved to more robustly handle flaky communication. (#3833)
  • Added a VISA version of the AMI430 driver. This is expected to be more robust with communication issues than the
    IP version of the driver. This driver exists alongside the IP version as
    qcodes.instrument_drivers.american_magnetics.AMI430_visa.py::AMI430. (#3842)
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