Myokit

- Added
- [979](https://github.com/myokit/myokit/pull/979) Added support for PyQt6 and PySide6.
- Changed
- [980](https://github.com/myokit/myokit/pull/980) Python 2 is no longer supported. The minimum supported Python version is now 3.7.
- Removed
- [979](https://github.com/myokit/myokit/pull/979) Removed support for PyQt4 and PySide, which were deprecated since 2019.

- Added
- [898](https://github.com/myokit/myokit/pull/899) martinjrobins Initial conditions for state variables can now be (constant-valued) expressions. Previously, only literals were allowed.
- [918](https://github.com/myokit/myokit/pull/918) Added `Model.initial_values`, which returns the model's initial values as a list of expressions, floats, or equations.
- [918](https://github.com/myokit/myokit/pull/918) Added `Model.set_initial_values`, which sets the model's initial values using a list of expressions or anything accepted by `map_to_state`.
- [918](https://github.com/myokit/myokit/pull/918) Added `Variable.initial_value`, which returns a state variable's initial value as an expression or float.
- [918](https://github.com/myokit/myokit/pull/918) Added `Variable.set_initial_value`, which sets a state variable's initial value using an expression, string expression, or float.
- [918](https://github.com/myokit/myokit/pull/918) Added `IllegalReferenceInInitialValueError` for illegal references made in initial value expressions.
- [947](https://github.com/myokit/myokit/pull/947) martinjrobins The `Simulation` class can now handle multiple protocols during a single simulation.
- [947](https://github.com/myokit/myokit/pull/947) Fixed-form protocols are now implemented in a `TimeSeriesProtocol`.
- Changed
- [898](https://github.com/myokit/myokit/pull/899) `Variable.promote` can now take an expression, a number, or a string (which will be parsed as an expression) for the argument `initial_value`.
- [909](https://github.com/myokit/myokit/pull/909) Myokit is now tested on Python 3.11.
- [909](https://github.com/myokit/myokit/pull/909) Myokit is no longer tested on Python 3.6.
- [918](https://github.com/myokit/myokit/pull/918) The only argument to `Variable.promote` has been renamed from `state_value` to `initial_value`.
- [918](https://github.com/myokit/myokit/pull/918) `Model.import_component` now preserves the ordering of the imported states.
- [953](https://github.com/myokit/myokit/pull/953) The DataLogViewer now overlaps traces with numbering (e.g. 0.membrane.V and 1.membrane.V), and toggles between files and variables with Page up and down Or Ctrl+Page up and down.
- [962](https://github.com/myokit/myokit/pull/962) Scipy is no longer a required dependency.
- [962](https://github.com/myokit/myokit/pull/962) The DataLogViewer only supports Matlab file loading if SciPy is installed.
- [975](https://github.com/myokit/myokit/pull/975) Global parameters in imported SBML documents are now placed in a component named `global` instead of `myokit`.
- [978](https://github.com/myokit/myokit/pull/978) The IDE now validates _either_ the model _or_ the protocol, depending on the current tab (previously both were validated).
- Deprecated
- [918](https://github.com/myokit/myokit/pull/918) `Model.state` is deprecated in favor of `Model.initial_values`.
- [918](https://github.com/myokit/myokit/pull/918) `Model.set_state` is deprecated in favor of `Model.set_initial_values`.
- [918](https://github.com/myokit/myokit/pull/918) `Model.inits` is deprecated.
- [918](https://github.com/myokit/myokit/pull/918) `Variable.state_value` is deprecated in favor of `Variable.initial_value`.
- [918](https://github.com/myokit/myokit/pull/918) `Variable.set_state_value` is deprecated in favor of `Variable.set_initial_value`.
- [918](https://github.com/myokit/myokit/pull/918) `Model.save_state` and `Model.load_state` are deprecated.
- [918](https://github.com/myokit/myokit/pull/918) The `Variable.promote` keyword argument `state_value` is deprecated in favor of `initial_value`.
- [947](https://github.com/myokit/myokit/pull/947) `Simulation.set_fixed_form_protocol` is deprecated in favor of using `Simulation.set_protocol` with a `TimeSeriesProtocol`
- [962](https://github.com/myokit/myokit/pull/962) The method `DataLog.regularize` is deprecated.
- [974](https://github.com/myokit/myokit/pull/974) `Variable.indice` is deprecated in favor of `Variable.index`.
- [976](https://github.com/myokit/myokit/pull/976) `SimulationOpenCL.neighbours` is deprecated in favor of `SimulationOpenCL.neighbors`.
- Removed
- [898](https://github.com/myokit/myokit/pull/899) `NonLiteralValueError` is now no longer raised by Myokit and so has been removed.
- [921](https://github.com/myokit/myokit/pull/921) Removed deprecated `LegacySimulation` class.
- [921](https://github.com/myokit/myokit/pull/921) Removed deprecated `PSimulation` class.
- [921](https://github.com/myokit/myokit/pull/921) Removed deprecated `ICSimulation` class.
- [957](https://github.com/myokit/myokit/pull/957) Removed the method `Model.prepare_bindings`.
- [961](https://github.com/myokit/myokit/pull/961) Removed the module `myokit.lib.common`, which had been deprecated since April 2018.
- Fixed
- [918](https://github.com/myokit/myokit/pull/918) Fixed error when `var()` was called on a `PartialDerivative` with a `Derivative` as first argument.
- [933](https://github.com/myokit/myokit/pull/933) Made `myokit.step` base its error classification (large/small/none) on numerics, not representation.
- [947](https://github.com/myokit/myokit/pull/947) Fixed minor memory leak (reference counting issue) when using fixed form protocols.
- [967](https://github.com/myokit/myokit/pull/967) Myokit no longer calls `logging.basicConfig()` when used as a library.
- [977](https://github.com/myokit/myokit/pull/977) `myokit.save()` now raises a `ValueError` if `model`, `protocol`, and `script` are all None.
- [978](https://github.com/myokit/myokit/pull/978) Clarified message shown in IDE after re-validation of valid model or protocol.

- Fixed
- [908](https://github.com/myokit/myokit/pull/908) Added new homebrew location used on M1 apple devices, potentially solving [#861](https://github.com/myokit/myokit/issues/861).
- [912](https://github.com/myokit/myokit/pull/912) Reporting of numerical errors in `Simulation` now catches more exception types arising from `evaluate_derivatives`.
- [951](https://github.com/myokit/myokit/pull/951) Made syntax highlighting in IDE recognise units containing `-` and `*`.

- Added
- [895](https://github.com/myokit/myokit/pull/895) Added method `Expression.depends_on_state()`.
- [901](https://github.com/myokit/myokit/pull/901) Added options `compatibility.no_capture` and `compatibility.no_fd_capture` to `myokit.ini` to allow users to tweak compiler output capturing.
- [903](https://github.com/myokit/myokit/pull/903) Fixed a bug in `SimulationOpenCL` that caused a `CL_INVALID_ARG_SIZE` error on strict systems.
- Changed
- [893](https://github.com/myokit/myokit/pull/893) `Variable.convert_unit` now returns `True` if a conversion was carried out or `False` if not.
- Fixed
- [888](https://github.com/myokit/myokit/pull/888) [#892](https://github.com/myokit/myokit/pull/892) Improved documentation for `Unit.conversion_factor` with help from martinjrobins.
- [895](https://github.com/myokit/myokit/pull/895) Fixed the value returned by `Name.diff()` and `Expression.diff()` for the situation where the associated RHS depends on a bound variable.
- [895](https://github.com/myokit/myokit/pull/895) Fixed performance issue in `Expression.depends_on`.
- [896](https://github.com/myokit/myokit/pull/896) Small improvements to Model, Component, and Variable documentation.

- Fixed
- [883](https://github.com/myokit/myokit/pull/883) Fixed memory leak in `myokit.Simulation` when using the `log_times` argument.

- Added
- [872](https://github.com/myokit/myokit/pull/872) The `myokit.Simulation` class can now be initialised using a precompiled backend (see the documentation for the ``path`` argument).
- Changed
- [872](https://github.com/myokit/myokit/pull/872) `Model.solvable_order` now returns consistently ordered equations, regardless of the order components and variables were created/parsed in.
- [872](https://github.com/myokit/myokit/pull/872) `myokit.tools.rmtree` now takes an optional argument `silent` that can be set to `True` to ignore any exceptions.
- [876](https://github.com/myokit/myokit/pull/876) `Model.import_component` can now take a list of possibly interdependent components.