CHANGELOG.rst

Change Log

[TODO]

• [???] Extensive tests for BridgeReward
• [???] Extensive tests for DistanceReward
• [???] test and doc for opponent
• [???] better logging
• [???] rationalize the public and private part of the API. Some members now are public but should be private.
• [???] better explanation of the notebook 3 with action silently
• [???] simulate in MultiEnv
• [???] in MultiEnv, when some converter of the observations are used, have each child process to compute it in parrallel and transfer the resulting data.
• [???] modeled batteries / pumped storage in grid2op (generator but that can be charged / discharged)
• [???] modeled dumps in grid2op (stuff that have a given energy max, and cannot produce more than the available energy)
• [???] fix notebook 5 texts

[0.9.2] - 2020-05-26

• [FIXED] GridObject loading from file does initialize single values (bool, int, float) correctly instead of creating a np.array of size one.
• [FIXED] IdToAct loading actions from file .npy
• [FIXED] a problem on the grid name import on some version of pandas
• [ADDED] a function that returns the types of the action see action.get_types()
• [ADDED] a class to "cache" the data in memory instead of reading it over an over again from disk (see grid2op.chronics.MultifolderWithCache
• [ADDED] improve the documentation of the observation class.
• [UPDATED] Reward LinesReconnectedReward to take into account maintenances downtimes
• [UPDATED] Adds an option to disable plotting load and generators names when using PlotMatplot

[0.9.1] - 2020-05-20

• [FIXED] a bug preventing to save gif with episode replay when there has been a game over before starting time step
• [FIXED] the issue of the random seed used in the environment for the runner.

[0.9.0] - 2020-05-19

• [BREAKING] Issue #83: attributes name of the Parameters class are now more consistent with the rest of the package. Use NB_TIMESTEP_OVERFLOW_ALLOWED instead of NB_TIMESTEP_POWERFLOW_ALLOWED, NB_TIMESTEP_COOLDOWN_LINE instead of NB_TIMESTEP_LINE_STATUS_REMODIF and NB_TIMESTEP_COOLDOWN_SUB instead of NB_TIMESTEP_TOPOLOGY_REMODIF
• [BREAKING] Issue #87: algorithm of the environment that solves the redispatching to make sure the environment meet the phyiscal constraints is now cast into an optimization routine that uses scipy.minimize to be solved. This has a few consequences: more dispatch actions are tolerated, computation time can be increased in some cases, when the optimization problem cannot be solved, a game over is thrown, scipy is now a direct dependency of grid2op, code base of grid2op is simpler.
• [BREAKING] any attempt to use an un intialized environment (eg after a game over but before calling env.reset will now raise a Grid2OpException)
• [FIXED] Issue #84: it is now possible to load multiple environments in the same python script and perform random action on each.
• [FIXED] Issue #86: the proper symmetries are used to generate all the actions that can "change" the buses (SerializationActionSpace.get_all_unitary_topologies_change).
• [FIXED] Issue #88: two flags are now used to tell the environment whether or not to activate the possibility to dispatch a turned on generator (forbid_dispatch_off) and whether or not to ignore the gen_min_uptimes and gen_min_downtime propertiers (ignore_min_up_down_times) that are initialized from the Parameters of the grid now.
• [FIXED] Issue #89: pandapower backend should not be compatible with changing the bus of the generator representing the slack bus.
• [FIXED] Greedy agents now uses the proper data types dt_float for the simulated reward (previously it was platform dependant)
• [ADDED] A way to limit EpisodeReplay to a specific part of the episode. Two arguments have been added, namely: start_step and end_step that default to the full episode duration.
• [ADDED] more flexibilities in IdToAct converter not to generate every action for both set and change for example. This class can also serialize and de serialize the list of all actions with the save method (to serialize) and the init_converter method (to read back the data).
• [ADDED] a feature to have multiple difficulty levels per dataset.
• [ADDED] a converter to transform prediction in connectivity of element into valid grid2op action. See Converter.ConnectivitiyConverter for more information.
• [ADDED] a better control for the seeding strategy in Environment and MultiEnvironment to improve the reproducibility of the experiments.
• [ADDED] a chronics class that is able to generate maintenance data "on the fly" instead of reading the from a file. This class is particularly handy to train agents with different kind of maintenance schedule.

[0.8.2] - 2020-05-13

• [FIXED] Issue #75: PlotGrid displays double powerlines correctly.
• [FIXED] Action += operator (aka. __iadd__) doesn't create warnings when manipulating identical arrays containing NaN values.
• [FIXED] Issue #70: for powerline disconnected, now the voltage is properly set to 0.0
• [UPDATED] Issue #40: now it is possible to retrieve the forecast of the injections without running an expensive "simulate" thanks to the obs.get_forecasted_inj method.
• [UPDATED] Issue #78: parameters can be put as json in the folder of the environment.
• [UPDATED] minor fix for env.make
• [UPDATED] Challenge tensorflow dependency to tensorflow==2.2.0
• [UPDATED] make documentation to reflect API changes of 0.8.0

[0.8.1] - 2020-05-05

• [FIXED] Issue #65: now the length of the Episode Data is properly computed
• [FIXED] Issue #66: runner is now compatible with multiprocessing again
• [FIXED] Issue #67: L2RPNSandBoxReward is now properly computed
• [FIXED] Serialization / de serialization of Parameters as json is now fixed

[0.8.0] - 2020-05-04

• [BREAKING] All previously deprecated features have been removed
• [BREAKING] grid2op.Runner is now located into a submodule folder
• [BREAKING] merge of env.time_before_line_reconnectable into env.times_before_line_status_actionable which referred to the same idea: impossibility to reconnect a powerilne. Side effect observation have a different size now ( merging of obs.time_before_line_reconnectable into obs.time_before_cooldown_line). Size is now reduce of the number of powerlines of the grid.
• [BREAKING] merge of act.vars_action into env.attr_list_vect which implemented the same concepts.
• [BREAKING] the runner now save numpy compressed array to lower disk usage. Previous saved runner are not compatible.
• [FIXED] grid2op.PlotGrid rounding error when casting from np.float32 to python.float
• [FIXED] grid2op.BaseEnv.fast_forward_chronics Calls the correct methods and is now working properly
• [FIXED] __iadd__ is now properly implemented for the action with proper care given to action types.
• [UPDATED] MultiEnv now exchange only numpy arrays and not class objects.
• [UPDATED] Notebooks are updated to reflect API improvements changes
• [UPDATED] grid2op.make can now handle the download & caching of datasets
• [UPDATED] Test/Sample datasets provide datetime related files .info
• [UPDATED] Test/Sample datasets grid_layout.json
• [UPDATED] grid2op.PlotGrid Color schemes and optional infos displaying
• [UPDATED] grid2op.Episode.EpisodeReplay Improved gif output performance
• [UPDATED] Action and Observation are now created without having to call init_grid(gridobject) which lead to small speed up and memory saving.

[0.7.1] - 2020-04-22

• [FIXED] a bug in the chronics making it not start at the appropriate time step
• [FIXED] a bug in "OneChangeThenNothing" agent that prevent it to be restarted properly.
• [FIXED] a bug with the generated docker file that does not update to the last version of the package.
• [FIXED] numpy, by default does not use the same datatype depending on the platform. We ensure that floating value are always np.float32 and integers are always np.int32
• [ADDED] a method to extract only some part of a chronic.
• [ADDED] a method to "fast forward" the chronics
• [ADDED] class grid2op.Reward.CombinedScaledReward: A reward combiner with linear interpolation to stay within a given range.
• [ADDED] grid2op.Reward.BaseReward.set_range: All rewards have a default setter for their reward_min and reward_max attributes.
• [ADDED] grid2op.PlotGrid: Revamped plotting capabilities while keeping the interface we know from grid2op.Plot
• [ADDED] grid2op.replay binary: This binary is installed with grid2op and allows to replay a runner log with visualization and gif export
• [ADDED] a LicensesInformation file that put a link for all dependencies of the project.
• [ADDED] make multiple dockers, one for testing, one for distribution with all extra, and one "light"
• [UPDATED] test data and datasets are no longer included in the package distribution
• [UPDATED] a new function make_new that will make obsolete the "grid2op.download" script in future versions
• [UPDATED] the python "requests" package is now a dependency

[0.7.0] - 2020-04-15

• [BREAKING] class grid2op.Environment.BasicEnv has been renamed BaseEnv for consistency. As this class should not be used outside of this code base, no backward compatibility has been enforced.
• [BREAKING] class grid2op.Environment.ObsEnv has been renamed _ObsEnv to insist on its "privateness". As this class should not be used outside of this code base, no backward compatibility has been enforced.
• [BREAKING] the "baselines" directory has been moved in another python package that will be released soon.
• [DEPRECATION] grid2op.Action.TopoAndRedispAction is now grid2op.Action.TopologyAndDispatchAction.
• [FIXED] Performances caveats regarding grid2op.Backend.PandaPowerBackend.get_topo_vect: Reduced the method running time and reduced number of direct calls to it.
• [FIXED] Command line install scripts: Can now use grid2op.main and grid2op.download after installing the package
• [FIXED] a bug that prevented to perform redispatching action if the sum of the action was neglectible (eg 1e-14) instead of an exact 0.
• [FIXED] Manifest.ini and dockerfile to be complient with standard installation of a python package.
• [ADDED] a notebook to better explain the plotting capabilities of grid2op (work in progrress)
• [ADDED] grid2op.Backend.reset as a way for backends to implement a faster way to reload the grid. Implemented in grid2op.Backend.PandaPowerBackend
• [ADDED] grid2op.Action.PowerlineChangeAndDispatchAction A subset of actions to limit the agents scope to 'switch line' and 'dispatch' operations only
• [ADDED] grid2op.Action.PowerlineChangeAction A subset of actions to limit the agents scope to 'switch line' operations only
• [ADDED] grid2op.Action.PowerlineSetAndDispatchAction A subset of actions to limit the agents scope to 'set line' and 'dispatch' operations only
• [ADDED] grid2op.Action.PowerlineSetAction A subset of actions to limit the agents scope to 'set line' operations only
• [ADDED] grid2op.Action.TopologySetAction A subset of actions to limit the agents scope to 'set' operations only
• [ADDED] grid2op.Action.TopologySetAndDispatchAction A subset of actions to limit the agents scope to 'set' and 'redisp' operations only
• [ADDED] grid2op.Action.TopologyChangeAction A subset of actions to limit the agents scope to 'change' operations only
• [ADDED] grid2op.Action.TopologyChangeAndDispatchAction A subset of actions to limit the agents scope to 'change' and 'redisp' operations only
• [ADDED] grid2op.Action.DispatchAction A subset of actions to limit the agents scope to 'redisp' operations only
• [ADDED] a new method to plot other values that the default one for plotplotly.
• [ADDED] a better plotting utilities that is now consistent with PlotPlotly, PlotMatplotlib and PlotPyGame
• [ADDED] a class to replay a logger using PlotPyGame class (grid2op.Plot.EpisodeReplay)
• [ADDED] a method to parse back the observations with lower memory footprint and faster, when the observations are serialized into a numpy array by the runner, and only some attributes are necessary.
• [ADDED] fast implementation of "replay" using PlotPygame and EpisodeData
• [UPDATED] overall documentation: more simple theme, easier organization of each section.

[0.6.1] - 2020-04-??

• [FIXED] Issue #54: Setting the bus for disconnected lines no longer counts as a substation operation.
• [FIXED] if no redispatch actions are taken, then the game can no more invalid a provided action due to error in the redispatching. This behavior was caused by increase / decrease of the system losses that was higher (in absolute value) than the ramp of the generators connected to the slack bus. This has been fixed by removing the losses of the powergrid in the computation of the redispatching algorithm. side effect for the generator connected to the slack bus, the ramp min / up as well as pmin / pmax might not be respected in the results data provided in the observation for example.
• [FIXED] a bug in the computation of cascading failure that lead (sometimes) to diverging powerflow when in the fact the powerflow did not diverge.
• [FIXED] a bug in the OneChangeThenNothing agent.
• [FIXED] a bug that lead to impossibility to load a powerline after a cascading failure in some cases. Now fixed by resetting the appropriate vectors when calling "env.reset".
• [FIXED] function env.attach_render that uses old names for the grid layout
• [ADDED] Remember last line buses: Reconnecting a line without providing buses will reconnect it to the buses it was previously connected to (origin and extremity).
• [ADDED] Change lines status (aka. switch_line_status) unitary actions for subclasses of AgentWithConverter.
• [ADDED] Dispatching unitary actions for subclasses of AgentWithConverter.
• [ADDED] CombinedReward. A reward combiner to compute a weighted sum of other rewards.
• [ADDED] CloseToOverflowReward. A reward that penalize agents when lines have almost reached max capacity.
• [ADDED] DistanceReward. A reward based on how far way from the original topology the current grid is.
• [ADDED] BridgeReward. A reward based on graph connectivity, see implementation in grid2op.Reward.BridgeReward for details

[0.6.0] - 2020-04-03

• [BREAKING] grid2op.GameRules module renamed to grid2op.RulesChecker
• [BREAKING] grid2op.Converters module renamed grid2op.Converter
• [BREAKING] grid2op.ChronicsHandler renamed to grid2op.Chronics
• [BREAKING] grid2op.PandaPowerBackend is moved to grid2op.Backend.PandaPowerBackend
• [BREAKING] RulesChecker.Allwayslegal is now Rules.Alwayslegal
• [BREAKING] Plotting utils are now located in their own module grid2op.Plot
• [DEPRECATION] HelperAction is now called ActionSpace to better suit open ai gym name. Use of HelperAction will be deprecated in future versions.
• [DEPRECATION] ObservationHelper is now called ObservationSpace to better suit open ai gym name. Use of ObservationHelper will be deprecated in future versions.
• [DEPRECATION] Action class has been split into BaseAction that serve as an abstract base class for all action class, and CompleteAction (that inherit from BaseAction) for the class allowing to perform every modification implemented in grid2op.
• [DEPRECATION] Observation class has renamed BaseObservation that serve as an abstract base class for all observation classes. Name Observation will be deprecated in future versions.
• [DEPRECATION] Agent class has renamed BaseAgent that serve as an abstract base class for all agent classes. Name Agent will be deprecated in future versions.
• [DEPRECATION] Reward class has renamed BaseReward that serve as an abstract base class for all reward classes. Name Reward will be deprecated in future versions.
• [DEPRECATION] LegalAction class has renamed BaseRules that serve as an abstract base class for all type of rules classes. Name LegalAction will be deprecated in future versions.
• [DEPRECATION] typo fixed in PreventReconection class (now properly named PreventReconnection)
• [ADDED] different kind of "Opponent" can now be implemented if needed (missing deep testing, different type of class, and good documentation)
• [ADDED] implement other "rewards" to look at. It is now possible to have an environment that will compute more rewards that are given to the agent through the "information" return argument of env.step. See the documentation of Environment.other_rewards.
• [ADDED] Alternative method to load datasets based on new dataset format: MakeEnv.make2
• [ADDED] Layout of the powergrid is part of the GridObject and is serialized along with the action_space and observation_space. Plotting utilities no longer require specific layout (custom layout can still be provided)
• [ADDED] A new kind of actions that can change the value (and buses) to which shunt are connected. This support will be helpfull for the VoltageControler class.
• [FIXED] Loading L2RPN_2019 dataset
• [FIXED] a bug that prevents the voltage controler to be changed when using grid2op.make.
• [FIXED] time_before_cooldown_line vector were output twice in observation space (see issue 47 part 1)
• [FIXED] the number of active bus on a substation was not computed properly, which lead to some unexpected behavior regarding the powerlines switches (depending on current stats of powerline, changing the buses of some powerline has different effect) (see issue 47 part 2)
• [FIXED] wrong voltages were reported for PandapowerBackend that causes some isolated load to be not detected (see issue 51 )
• [FIXED] improve the install script to not crash when numba can be installed, but cannot be loaded. (see issue 50 )
• [UPDATED] import documentation of Space especially in case someone wants to build other type of Backend

[0.5.8] - 2020-03-20

• [ADDED] runner now is able to show a progress bar
• [ADDED] add a "max_iter" in the runner.
• [ADDED] a repository in this github for the baseline (work in progress)
• [ADDED] include grid2Viz in a notebook (the notebook "StudyYourAgent")
• [ADDED] when a file is not present in the chronics, the chronics_handler behaves as if nothing changes. If no files at all are provided, it raises an error.
• [ADDED] possibility to change the controler for the generator voltage setpoints (See VoltageControler for more information). It can be customized as of now.
• [ADDED] lots of new tests for majority of classes (ChronicsHandler, BaseAction, Observations etc.)
• [FIXED] voltages are now set to 0 when the powerline are disconnected, instead of being set to Nan in pandapower backend.
• [FIXED] ReadPypowNetData does not crash when argument "chunk_size" is provided now.
• [FIXED] some typos in the Readme
• [FIXED] some redispatching declared illegal but are in fact legal (due to a wrong assessment) (see issue 44)
• [FIXED] reconnecting a powerline now does not count the mandatory actions on both its ends (previously you could not reconnect a powerline with the L2RPN 2019 rules because it required acting on 2 substations) as "substation action"
• [UPDATED] add a blank environment for easier use.
• [UPDATED] now raise an error if the substations layout does not match the number of substations on the powergrid.
• [UPDATED] better handling of system without numba issue 42)
• [UPDATED] better display of the error message if all dispatchable generators are set issue 39
• [UPDATED] change the link to the doc in the notebook to point to readthedoc and not to local documentation.
• [UPDATED] Simulate action behavior result is the same as stepping given perfect forecasts at t+1

[0.5.7] - 2020-03-03

• [ADDED] a new environment with consistant voltages based on the case14 grid of pandapower (case14_relistic)
• [ADDED] a function to get the name on the element of the graphical representation.
• [ADDED] a new class to (PlotMatPlotlib) to display the grid layout and the position of the element, as well as their name and ID
• [ADDED] possibility to read by chunk the data (memory efficiency and huge speed up at the beginning of training) (issue 21)
• [ADDED] improved method to limit the episode length in chronics handler.
• [ADDED] a method to project some data on the layout of the grid (GetLayout.plot_info)
• [FIXED] a bug in the simulated reward (it was not initialized properly)
• [FIXED] add the "prod_charac.csv" for the test environment case14_test, case14_redisp, case14_realistic and case5_example
• [FIXED] fix the display bug in the notebook of the l2rpn starting kit with the layout of the 2 buses
• [UPDATED] now attaching the layout metadata directly into the environment
• [UPDATED] obs.simulate now has the same code as env.step this include the same signature and the possibility to simulate redispatching actions as well.
• [UPDATED] Notebook 6 to train agent more efficiently (example: prediction of actions in batch)
• [UPDATED] PlotGraph to derive from GridObjects allowing to be inialized at creation and not when first observation is loaded (usable without observation)
• [UPDATED] new default environment (case14_relistic)
• [UPDATED] data for the new created environment.
• [UPDATED] implement redispatching action in obs.simulate
• [UPDATED] refactoring Environment and ObsEnv to inherit from the same base class.

[0.5.6] - 2020-02-25

• [ADDED] Notebook 6 to explain multi environment
• [ADDED] more type of agents in the notebook 3
• [FIXED] Environment now properly built in MultiEnvironment
• [FIXED] Notebook 3 to now work with both neural network
• [FIXED] remove the "print" that displayed the path of the data used in MultiEnvironment
• [UPDATED] the action space for "IdToAct" now reduces the number of possible actions to only actions that don't directly cause a game over.

[0.5.5] - 2020-02-14

• [ADDED] a easier way to set the thermal limits directly from the environment (env.set_thermal_limit)
• [ADDED] a new environment with redispatching capabilities (case14_redisp) including data
• [ADDED] a new convenient script to download the dataset, run python3 -m grid2op.download --name "case14_redisp" from the command line.
• [ADDED] new rewards to better take into account redispatching (EconomicReward and RedispReward)
• [ADDED] a method to check if an action is ambiguous (act.is_ambiguous())
• [ADDED] a method to set more efficiently the id of the chronics used in the environment (env.set_id)
• [ADDED] env.step now propagate the error in "info" output (but not yet in obs.simulate)
• [ADDED] notebooks for redispatching (see getting_started/5_RedispacthingAgent.ipynb)
• [ADDED] now able to initialize a runner from a valid environment (see env.get_params_for_runner)
• [FIXED] reconnecting too soon a powerline is now forbidden in l2rpn2019 (added the proper legal action)
• [UPDATED] more information in the error when plotly and seaborn are not installed and trying to load the graph of the grid.
• [UPDATED] setting an object to a busbar higher (or equal) than 2 now leads to an ambiguous action.
• [UPDATED] gitignore to really download the "prod_charac.csv" file
• [UPDATED] private member in action space and observation space (_template_act and _empty_obs) to make it clear it's not part of the public API.
• [UPDATED] change default environment to case14_redisp
• [UPDATED] notebook 2 now explicitely says the proposed action is ambiguous in a python cell code (and not just in the comments) see issue (issue 27)

[0.5.4] - 2020-02-06

• [ADDED] better handling of serialization of scenarios.

[0.5.3] - 2020-02-05

• [ADDED] parrallel processing of the environment: evaluation in parrallel of the same agent in different environments.
• [ADDED] a way to shuffle the order in which different chronics are read from the hard drive (see MultiFolder.shuffle)
• [FIXED] utility script to push docker file
• [FIXED] some tests were not passed on the main file, because of a file ignore by git.
• [FIXED] improve stability of pandapower backend.
• [UPDATED] avoid copying the grid to build observation

[0.5.2] - 2020-01-27

• [ADDED] Adding a utility to retrieve the starting kit L2RPN 2019 competition.
• [ADDED] Layout of the powergrid graph of the substations for both the 5bus_example and the CASE_14_L2RPN2019.
• [FIXED] Runner skipped half the episode in some cases (sequential, even number of scenarios). Now fixed.
• [FIXED] Some typos on the notebook "getting_started4-StudyYourAgent.ipynb".
• [FIXED] Error in the conversion of observation to dictionnary. Twice the same keys were used ('time_next_maintenance') for both time_next_maintenance and duration_next_maintenance.
• [UPDATED] The first chronics that is processed by a runner is not the "first" one on the hardrive (if sorted in alphabetical order)
• [UPDATED] Better layout of substation layout (in case of multiple nodes) in PlotGraph

[0.5.1] - 2020-01-24

• [ADDED] extra tag 'all' to install all optional dependencies.
• [FIXED] issue in the documentation of BaseObservation, voltages are given in kV and not V.
• [FIXED] a bug in the runner that prevented the right chronics to be read, and output wrong names
• [FIXED] a bug preventing import if plotting packages where not installed, that causes the documentation to crash.

[0.5.0] - 2020-01-23

• [BREAKING] BaseAction/Backend has been modified with the implementation of redispatching. If you used a custom backend, you'll have to implement the "redispatching" part.
• [BREAKING] with the introduction of redispatching, old action space and observation space, stored as json for example, will not be usable: action size and observation size have been modified.
• [ADDED] A converter class that allows to pre-process observation, and post-process action when given to an BaseAgent. This allows for more flexibility in the action_space and observation_space.
• [ADDED] Adding another example notebook getting_started/Example_5bus.ipynb
• [ADDED] Adding another renderer for the live environment.
• [ADDED] Redispatching possibility for the environment
• [ADDED] More complete documentation of the representation of the powergrid (see documentation of Space)
• [FIXED] A bug in the conversion from pair unit to kv in pandapower backend. Adding some tests for that too.
• [UPDATED] More complete documentation of the BaseAction class (with some examples)
• [UPDATED] More unit test for observations
• [UPDATED] Remove the TODO's already coded
• [UPDATED] GridStateFromFile can now read the starting date and the time interval of the chronics.
• [UPDATED] Documentation of BaseObservation: adding the units (issue 22)
• [UPDATED] Notebook getting_started/4_StudyYourAgent.ipynb to use the converter now (much shorter and clearer)

[0.4.3] - 2020-01-20

• [FIXED] Bug in L2RPN2019 settings, that had not been modified after the changes of version 0.4.2.

[0.4.2] - 2020-01-08

• [BREAKING] previous saved BaseAction Spaces and BaseObservation Spaces (as dictionnary) are no more compatible
• [BREAKING] renaming of attributes describing the powergrid across classes for better consistency:

Class Name	Old Attribute Name	New Attribute Name
Backend	n_lines	n_line
Backend	n_generators	n_gen
Backend	n_loads	n_load
Backend	n_substations	n_sub
Backend	subs_elements	sub_info
Backend	name_loads	name_load
Backend	name_prods	name_gen
Backend	name_lines	name_line
Backend	name_subs	name_sub
Backend	lines_or_to_subid	line_or_to_subid
Backend	lines_ex_to_subid	line_ex_to_subid
Backend	lines_or_to_sub_pos	line_or_to_sub_pos
Backend	lines_ex_to_sub_pos	line_ex_to_sub_pos
Backend	lines_or_pos_topo_vect	line_or_pos_topo_vect
Backend	lines_ex_pos_topo_vect	lines_ex_pos_topo_vect
BaseAction / BaseObservation	_lines_or_to_subid	line_or_to_subid
BaseAction / BaseObservation	_lines_ex_to_subid	line_ex_to_subid
BaseAction / BaseObservation	_lines_or_to_sub_pos	line_or_to_sub_pos
BaseAction / BaseObservation	_lines_ex_to_sub_pos	line_ex_to_sub_pos
BaseAction / BaseObservation	_lines_or_pos_topo_vect	line_or_pos_topo_vect
BaseAction / BaseObservation	_lines_ex_pos_topo_vect	lines_ex_pos_topo_vect
GridValue	n_lines	n_line

• [FIXED] Runner cannot save properly action and observation (sizes are not computed properly) now fixed and unit test added
• [FIXED] Plot utility has a bug in extracting grid information. now fixed
• [FIXED] gym compatibility issue for environment
• [FIXED] checking key-word arguments in "make" function: if an invalid argument is provided, it now raises an error.
• [UPDATED] multiple random generator streams for observations
• [UPDATED] Refactoring of the BaseAction and BaseObservation Space. They now both inherit from "Space"
• [UPDATED] the getting_started notebooks to reflect these changes

[0.4.1] - 2019-12-17

• [FIXED] Bug#14 : Nan in the observation space after switching one powerline [PandaPowerBackend]
• [UPDATED] plot now improved for buses in substations

[0.4.0] - 2019-12-04

• [ADDED] Basic tools for plotting with the PlotPlotly module
• [ADDED] support of maintenance operation as well as hazards in the BaseObservation (and appropriated tests)
• [ADDED] support for maintenance operation in the Environment (read from the chronics)
• [ADDED] example of chronics with hazards and maintenance
• [UPDATED] handling of the AmbiguousAction and IllegalAction exceptions (and appropriated tests)
• [UPDATED] various documentation, in particular the class BaseObservation
• [UPDATED] information retrievable BaseObservation.state_of

[0.3.6] - 2019-12-01

• [ADDED] functionality to restrict action based on previous actions (impacts Environment, RulesChecker and Parameters)
• [ADDED] tests for the notebooks in getting_started
• [UPDATED] readme to properly show the docker capability
• [UPDATED] Readme with docker

[0.3.5] - 2019-11-28

• [ADDED] serialization of the environment modifications
• [ADDED] the changelog file
• [ADDED] serialization of hazards and maintenance in actions (if any)
• [FIXED] error messages in grid2op.GridValue.check_validity
• [UPDATED] notebook getting_started/4_StudyYourAgent.ipynb to reflect these changes