Wandb

:nail_care: Enhancement

- Disable wandb logging with `wandb disabled` or `wandb.init(mode="disabled")`
- Support cloning an artifact when logging wandb.Image()

:bug: Bug Fix

- Multiple media artifact improvements and internal refactor
- Improve handling of artifact errors
- Fix issue where notebook name was ignored
- Extend silent mode for jupyter logging
- Fix issue where vendored libraries interfered with python path
- Fix various exceptions (divide by zero, int conversion, TypeError)

:nail_care: Enhancement

- Added confusion matrix plot
- Better jupyter messages with wandb.init()/reinit/finish

:bug: Bug Fix

- Fix for fastai 2.1.5 (removed log_args)
- Fixed media logging when directories are changed

:nail_care: Enhancement

- Added artifact media logging (alpha)
- Add scriptable alerts
- Add url attribute for sweep public api
- Update docstrings for wandb sdk functions

:bug: Bug Fix

- Fix cases where offline mode was making network connections
- Fix issues with python sweeps and run stopping
- Fix logging issue where we could accidently display an api key
- Fix wandb login issues with malformed hosts
- Allow wandb.restore() to be called without wandb.init()
- Fix resuming (reusing run_id) with empty summary
- Fix artitifact download issue
- Add missing wandb.unwatch() function
- Avoid creating spurious wandb directories
- Fix collections import issue when using an old version of six

:nail_care: Enhancement

- Allow callables to be serialized

:bug: Bug Fix

- Fix compatibility issue with python 3.9
- Fix `wandb sync` failure introduced in 0.10.6
- Improve python agent handling of failing runs
- Fix rare condition where resuming runs does not work
- Improve symlink handling when called in thread context
- Fix issues when changing directories before calling wandb.init()

:bug: Bug Fix

- Fix issue when checking for updated releases on pypi

:bug: Bug Fix

- Make sure code saving is enabled in jupyter environments after login
- Sweep agents have extended timeout for large sweep configs
- Support WANDB_SILENT environment variable
- Warn about missing python package when logging images
- Fix wandb.restore() to apply diff patch
- Improve artifact error messages
- Fix loading of config-defaults.yaml and specified list of yaml config files