* update versions for patch release (#3970)
* update versions for patch releae
* Update precommit flake8 (#3961)
* fix changelog
* Release 2 cherry pick (#3971)
* [bug-fix] Fix issue with initialize not resetting step count (#3962)
* Develop better error message for #3953 (#3963)
* Making the error for wrong number of agents raise consistently
* Better error message for inputs of wrong dimensions
* Fix#3932, stop the editor from going into a loop when a prefab is selected. (#3949)
* Minor doc updates to release
* add unit tests and fix exceptions (#3930)
Co-authored-by: Ervin T <ervin@unity3d.com>
Co-authored-by: Vincent-Pierre BERGES <vincentpierre@unity3d.com>
Co-authored-by: Chris Goy <christopherg@unity3d.com>
* update changelog (#3975)
* [docs] Add memory_size hyperparameter (#3973)
* Release 2 docs (#3976)
* Add v1.0 blog post and update reference paper. (#3947)
* Develop mm fix readme rel...
* allow vector observations also when using visual observations
* update changelog
* Update CHANGELOG.md
* Update __init__.py
* remove trailing whitespace
* Fix test case where visual and vector observations are used simultaneously
* fix formatting
* add test for visual and vector observations
* Assert vector action shape
* Fix test environment to return multiple visual observations
* use_visual and allow_multiple_visual_obs are replaced by allow_multiple_obs which allows visual and vector observations to be used simultaneously.
* fixing run_gym.py test
* [ci]
* Added some more tests and made the observation space a tuple when using multiple observations
* Modifying the change log
* Addding to the Migrating doc
* Edits to Migrating.md
* Simplification of the code to generate the observation spaces
* Simplified warning messages
* Adding contr...
* [WIP] Unity Environment Registry
[JIRA ticket](https://jira.unity3d.com/browse/MLA-997)
[Design Document](https://docs.google.com/document/d/1bFQ3_oXsA80FMou8kwqYxC53kqG5L3i0mbTQUH4shY4/edit#)
In This PR : Prototype of the Unity Environment Registry
Uploaded the 3DBall and Basic Environments for mac only
How to use on Python :
```python
from mlagents_envs.registry import UnityEnvRegistry
registry = UnityEnvRegistry()
print(registry["3DBall"].description)
env = registry["3DBall"].make()
env.reset()
for i in range(10):
print(i)
env.step()
env.close()
```
* Other approach:
- UnityEnvRegistry is no longer static and needs to be instantiated
- Providing a default_registry that will contains our environments
- Added a functionality to register RemoteRegistryEntry with a yaml file
* Some extra verification of the url : The binary will have a hash of the url in its name to make sure the right environ...
* Making some things private in UnityEnvironment
* Readding the default ports as public
* removing _SCALAR_ACTION_TYPES and _SINGLE_BRAIN_ACTION_TYPES
* Removing unused method
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