Change log

This is a list of changes between each version.

Version 1.x

Transitioning from version 0.x to version 1.x saw lots of interface changes which break backward compatibility. The previous version of the library can be either obtained on PyPi using pip install "pylablib<1", or by using legacy module. Hence, instead of

import pylablib as pll
from pylablib.aux_libs.devices import Lakeshore

you can write

import pylablib.legacy as pll
from pylablib.legacy.aux_libs.devices import Lakeshore


  • General

    • Minor speedups through calls caching.
    • Changed muxcall signature to allow multiple special argument values.
  • Devices

    • Added Princeton Instruments cameras, IDS uEye cameras (as an option in uc480 cameras backend), Thorlabs Kinesis piezo motor controllers (e.g., KIM101) and quadrature photo-detector controllers (e.g., KPA101).
    • Added RS485 Arcus connection and a simple single-motor stage (DMX-J-SA).
    • Improved reliability if errors are encountered upon connection.
    • Multiple minor bug fixes and improved support of specific models.
  • GUI

    • Added widgets: menu dropdown button, scroll area container, area highlighter.
    • Added querying element position and layout shape in layout widgets.
    • Added more utilities methods: querying containing layout, querying top-level parent, deleting widget.
  • Threading

    • Added simple profiling through yappi.


  • General

    • Added restarting methods for regular and threaded applications.
  • Threading

    • Bugfixes in cameras and camera threads.
    • Bugfixes in streaming.


  • General

    • Added timing context manager for simple code timing checks.
    • Improved RPyC wrapper logging and reliability.
    • Added Anaconda support.
    • Added minor network and file functions.
  • Devices

    • Added Newport Picomotor 8742 motor controller, Toptica iBeam Smart laser, older version of Thorlabs FW motorized filter wheel.
    • Added camera frame output format (list or array).
    • Added use_cavity option to M2 Solstis laser.
    • Added method for auto-detecting associations between PhotonFocus cameras and frame grabbers.
    • Updated some generic classes (DCAM cameras, Thorlabs TLCamera cameras).
    • Updated SCPI failsafe operation, improved Thorlabs FW reliability.
    • Fixed several minor bugs.
  • GUI

    • Rewritten GUI values handling to pass calls in a hierarchical manner. This makes the operation more predictable and overloading the behavior a bit easier.
    • Added out-of-range value action for combo boxes.
    • Fixed ImagePlotter incompatibility with the newer pyqtgraph versions, added separate x and y axis line cuts selection.
    • Minor layout handling bugfixes.
  • Threading

    • Released advanced threading functionality: table/frame streaming, device threads, basic frame processing.
    • Task thread additions: delayed batch job stopping, context manager for task loop pausing.
    • Added argument-dependent call queue limit.
    • Improved threading speed and stability.


  • General

    • Reorganized the core modules import structure: now modules are mostly empty, and all the necessary imports are either exposed directly in pylablib (e.g., pylablib.Fitter), or should be accessed directly by the module (e.g. pll.core.dataproc.fitting.Fitter). Intermediate access (e.g., pll.core.dataproc.Fitter) is no longer supported.
    • File IO functions (e.g., read_csv) can now take file-like objects in addition to paths.
  • Devices

    • Added Silicon Software frame grabbers interface and rearranged PhotonFocus code to include both IMAQ and SiliconSoftware frame grabbers.
    • Fixed various compatibility bugs arising for specific versions of Python or dependency modules: Kinesis error with specific pyft232 versions, some DLL-dependent devices errors with Python 3.8+, DLL types in 32-bit Python.
    • Addressed issue with occasional uc480 acquisition restarts, fixed M2 communication report errors.
  • GUI and threading

    • Added container and layout management classes in addition to parameter tables for more consistent GUI structure organization.
    • Added pylablib.widgets module which combines all custom widgets for the ease of using in layout managers or custom applications.
    • Fixed support for PySide2 Qt5 backed.
    • Renamed setupUi -> setup for all widgets, and changed the GUI setup organization for many of them (the functioning stayed the same).
    • Reorganized scheduling in QTaskThread to treat jobs, commands, and subscriptions more consistently.
    • Added basic data stream management.


There have been too many alterations to list here comprehensively. Below is the list of the largest changes.

  • General

    • Removed built-in DataTable class (together with core.datatable subpackage) in favor of pandas.
    • Renamed file IO functions: instead of generic load and save methods there are now more specific loadfile.load_csv(), loadfile.load_dict(), etc.
    • Removed some legacy modules which are not used in the rest of the library.
    • Renamed or moved certain modules: core.utils.rpyc -> core.utils.rpyc_utils, core.fileio.logfile -> core.fileio.table_stream, core.fileio.binio -> core.utils.binio , core.devio.backend -> core.devio.backencd_comm, core.devio.untis -> core.utils.units, core.dataproc.waveforms -> core.dataproc.utils
  • Devices

    • Some legacy devices have been removed, since without access to the hardware it is hard to maintain and expand them. These include most of Agilent devices (33502A amplifier, N9310A microwave generator, HP 8712B and HP 8722D network analyzers, HP 8168F laser), Rigol DSA1030A spectrum analyzer, Tektronix MDO3000 oscilloscope, Vaunix LabBrick generators, Zurich Instruments HF2 and UHF, Andor Shamrock spectrographs (should be restored in future releases), NuPhoton NP2000 EDFA, PurePhotonics PPCL200 laser, Sirah Matisse laser (should be restored in future releases), Thorlabs PM100 power meter (should be restored in future releases), Lakeshore 370 resistance bridge (should be restored in future releases), MKS 900-series pressure gauges, and some custom devices (Arduino and Olimex AVR boards and Janis-related hardware).
    • The main devices package has been moved from pylablib.aux_libs.devices (which now refers to the legacy code) to pylablib.devices. Module organization has also changed slightly. To find the required modules and device class names, see the devices list.
    • Lots of devices’ interface has varied slightly, to make the interface more uniform and compatible between different kinds of devices. The changes are usually fairly straightforward (e.g., move_to instead of move). In many cases the interface was also expanded to include additional available methods.
    • Several devices have been added, generalized, or restructured:
    • Simplified the way external DLLs are handled
    • Unified the error handling
  • GUI and threading

    • Changed module structure
      • threading and GUI are now separate sub-packages core.thread and core.gui
      • all widgets are available simply through pylablib.widgets (simplifies integration with Qt Designer)
      • moved parameter tables widgets to the core library
    • Renamed some widgets to remove the LV prefix.
    • Interfaces changes in some of the classes: thread controllers, parameter tables, value tables. The changes are mostly cosmetics and involve names and parameters order. Most important changes:
      • thread controller methods: subscribe -> subscribe_sync, sync_exec -> sync_exec_point,
      • thread controller command/query shortcut: .c -> .ca, .q -> .cs, .qi -> .csi, .qs -> .css
      • thread controller variable access uses .v shortcut, i.e., instead of ctl[name] it is now ctl.v[name]
      • GUI value storage ValuesTable/IndicatorValuesTable are now combined and named as GUIValues
      • ParamTable and GUIValues uses .h shortcut to access value handlers, i.e., instead of table[name] it is now table.h[name]
      • ParamTable, ImagePlotterCtl, TracePlotterCtl constructor arguments: display_table -> gui_values, display_table_root -> gui_values_root
      • value-changed signal names in ParamTable and GUIValues: changed_event -> get_value_changed_signal
      • value-changed signal names in value handlers: value_changed_signal -> get_value_changed_signal
      • ParamTable methods: lock -> set_enabled, add_button(checkable=True) -> add_toggle_button
      • NumEdit and NumLabel methods: set_number_format -> set_formatter, set_number_limit -> set_limiter (the call signature also changed)
      • renamed signals to multicasts to avoid confusion with built-in Qt signals. Leads to ThreadController.send_signal -> send_multicast, ThreadController.process_signal -> process_multicast, ThreadController constructor argument signal_pool -> multicast_pool, class SignalPool -> MulticastPool, QSignalThreadCallScheduler -> QMulticastThreadCallScheduler.

Version 0.x


Interface changes

  • Slightly changed representations of complex number in to-string conversions depending on the conversion rules ("python" vs "text").


  • Devices

    • Added Thorlabs K10CR1 rotational stage (legacy.aux_libs.devices.Thorlabs.K10CR1)
    • Added Andor Shamrock spectrographs (legacy.aux_libs.devices.AndorShamrock)
    • Expanded Agilent AWG class
    • Added more 32bit dlls
    • Added list_resources method to every backend class, which lists available connections for this backend (not available for every backend; so far only works in legacy.core.devio.backed.VisaDeviceBackend, legacy.core.devio.backed.SerialDeviceBackend, and legacy.core.devio.backed.FT232BackendOpenError.
  • GUI and threading

    • Added legacy.aux_libs.gui.helpers.TableAccumulatorThread.preprocess_data method to pre-process incoming data before adding it to the table
    • Added update_only_on_visible argument to legacy.aux_libs.gui.widgets.trace_plotter.TracePlotter.setupUi method, and legacy.aux_libs.gui.widgets.trace_plotter.TracePlotter.get_required_channels method.


Interface changes

  • Dictionary entries (legacy.core.fileio.dict_entry) system has been slightly redesigned: building entries from stored objects has been moved from legacy.core.fileio.dict_entry.IDictionaryEntry.build_entry class method to a dedicated function legacy.core.fileio.dict_entry.build_entry, and entry classes have been added.
  • legacy.aux_libs.gui.helpers.StreamFormerThread architecture changes, so that it can accumulates several rows before adding them into the storage; this lead to replacement of legacy.aux_libs.gui.helpers.StreamFormerThread.prepare_new_row method by legacy.aux_libs.gui.helpers.StreamFormerThread.prepare_new_data.


  • General

    • Added pandas support in a bunch of places: loading/saving tables and dictionaries; data processing routines in legacy.core.dataproc; conversion of legacy.core.dataproc.datatable.DataTable and legacy.core.utils.dictionary.Dictionary object to/from pandas dataframes.
    • Expanded string conversion to support more explicit variable classes. For example, a numpy array np.array([1,2,3]) can be converted into a string 'array([1, 2, 3])' instead of a more ambiguous string '[1, 2, 3]' (which can also be a list). This behavior is controlled by a new argument use_classes in string conversion functions (such as legacy.core.utils.string.to_string and legacy.core.utils.string.from_string) and an argument use_rep_classes in file saving (
    • Added general library parameters, which can be accessed via pylablib.par (works as a dictionary object). So far there’s only one supported parameter: the default return type of the CSV file reading (can be "pandas" for pandas dataframe, "table" for legacy.core.dataproc.datatable.DataTable object, or "array" for raw numpy array).
  • Devices

    • Added LaserQuantum Finesse device class (legacy.aux_libs.devices.devices.LaserQuantum)
    • NI DAQ now supports output of waveforms
    • Added legacy.aux_libs.devices.PCO_SC2.reset_api and legacy.aux_libs.devices.PCO_SC2.PCOSC2Camera.reboot methods for resetting API and cameras
    • Added legacy.aux_libs.devices.Thorlabs.list_kinesis_devices function to list connected Kinesis devices
    • Added serial communication methods for IMAQ cameras (legacy.aux_libs.devices.IMAQ.IMAQCamera)
  • GUI and threading

    • Added line plotter (legacy.aux_libs.gui.widgets.line_plotter) and trace plotter (legacy.aux_libs.gui.widgets.trace_plotter) widgets
    • Added virtual elements to value tables and parameter tables
    • Added gui_thread_safe parameter to value tables and parameter tables. Enabling it make most common methods thread-safe (i.e., transparently called from the GUI thread)
    • Added a corresponding legacy.core.gui.qt.thread.controller.gui_thread_method wrapper to implement the change above
    • Added functional thread variables (legacy.core.gui.qt.thread.controller.QThreadController.set_func_variable)
  • File saving / loading

    • Added notation for dictionary files to include nested structures (‘prefix blocks’). This lets one avoid common path prefix in stored dictionary files. For example, a file

      some/long/prefix/x  1
      some/long/prefix/y  2
      some/long/prefix/y  3

      can be represented as

          x   1
          y   2
          z   3

      The meaningful elements are //some/long/prefix line denoting that following elements have the given prefix, and /// line denoting that the prefix block is done (indentation is only added for clarity).

    • New dictionary entries: dict_entry.ExternalNumpyDictionaryEntry (external numpy array, can have arbitrary number of dimensions) and dict_entry.ExpandedContainerDictionaryEntry (turns lists, tuples and dicts into dictionary branches, so that their content can benefit from the automatic table inlining, dictionary entry classes, etc.).

  • Data processing

    • legacy.core.dataproc.fitting.Fitter now takes default scale and limit as constructor arguments.
    • legacy.core.dataproc.feature.multi_scale_peakdet has new norm_ratio argument.
    • legacy.core.dataproc.image.get_region and legacy.core.dataproc.image.get_region_sum take axis argument.
  • Miscellaneous

    • Functions introspection module now supports Python 3 - style functions, and added a new function legacy.core.utils.functions.funcsig
    • legacy.core.utils.general.StreamFileLogger supports multiple destination paths
    • New network function (return list of all local addresses on all interfaces) and