* [Enhancement] Add PolyParamScheduler, PolyMomentum and PolyLR

* min_lr -> eta_min, refined docstr

* rename global accessible and intergration get_sintance and create_instance

* move ManagerMixin to utils

* fix as docstring and seporate get_instance to get_instance and get_current_instance

* fix lint

* fix docstring, rename and move test_global_meta

* rename LogBuffer to HistoryBuffer, rename MessageHub methods, MessageHub support resume

* refine MMLogger timestamp, update unit test

* MMLogger add logger_name arguments

* Fix docstring

* Add LogProcessor and some unit test

* update unit test

* complete LogProcessor unit test

* refine LoggerHook

* solve circle import

* change default logger_name to mmengine

* refactor eta

* Fix docstring comment and unitt test

* Fix with runner

* fix docstring

fix docstring

* fix docstring

* Add by_epoch attribute to LoggerHook and fix docstring

* Please mypy and fix comment

* remove \ in MMLogger

* Fix lint

* roll back pre-commit-hook

* Fix hook unit test

* Fix comments

* remove \t in log and add docstring

* Fix as comment

* should not accept other arguments if corresponding instance has been created

* fix logging ddp file saving

* fix logging ddp file saving

* move log processor to logging

* move log processor to logging

* remove current datalaoder

* fix docstring

* fix unit test

* add learing rate in messagehub

* Support output training/validation/testing message after iterations/epochs

* fix docstring

* Fix IterBasedRunner log string

* Fix IterBasedRunner log string

* Support parse validation loss in log processor

* Refine Visualizer docs

* update

* update

* update featmap

* update docs

* update visualizer docs

* [Docs] Refine registry documentation

* reslove comments

* minor refinement

* refactor docs of basedataset

* fix ci

* fix comments

* fix comments

* fix comments

* fix comments

* fix comments

* set default value of ann_file to ''

* fix comments

* rename global accessible and intergration get_sintance and create_instance

* move ManagerMixin to utils

* fix as docstring and seporate get_instance to get_instance and get_current_instance

* fix lint

* fix docstring, rename and move test_global_meta

* rename LogBuffer to HistoryBuffer, rename MessageHub methods, MessageHub support resume

* refine MMLogger timestamp, update unit test

* MMLogger add logger_name arguments

* Fix docstring

* change default logger_name to mmengine

* Fix docstring comment and unitt test

* fix docstring

fix docstring

* fix docstring

* Fix lint

* Fix hook unit test

* Fix comments

* should not accept other arguments if corresponding instance has been created

* fix logging ddp file saving

* fix logging ddp file saving

* fix docstring

* fix unit test

* fix docstring as comment

* automatic update iter and epoch in message_hub

* add docstring

* Update comment and docstring

* Fix as comment

* Fix docstring and comment

* refine comments

* Modify hook documentation

* reslove comments

* [Doc] Refine runner doc.

* resolve comments

* Refactor logging tutorial docs

* Add logging flow description

* fix docstring as comment

fix docstring as comment

* fix logging tutorial

* refine docs of data element

* update

* resolve comments

* [Enhancement] Provide MultiProcessTestCase to test distributed related modules

* remove debugging info

* add timeout property

* [Enhancement] Refactor the unit tests of dist module with MultiProcessTestCase

* minor refinement

* minor fix

* [Refactor] Refactor Evaluator to Metric.

* update

* fix lint

* fix doc

* fix lint

* resolve comments

* resolve comments

* remove collect_device from evaluator

* rename

* add get_subset method, add comment, rename variable

* add unit test

* Please mypy

* Fix as comment, support negative index, and fix index access error

* add and refine docstring, handle indices=0

* handle indices=0

* add empty list indices test

* rename in_meta in docstring and comments to in_metainfo

* clean meta nameing

* Fix negative indices error

* test empty list of get_subset

* fix comments and docstring

* add unit test

* Fix as comment

* Fix as comment

* add docstring to mention wrapped dataset should not inherit from Basedataset

* Fix wrapped dataset docstring

* Fix wrapped dataset docstring

* Fix method name, docstring, and comments

* Fix comments

* Fix comments

* Fix comments

* Add circleci

* fix typo

* lower required coverage

* support initialzing distributed environemtn without GPUs

* fix unit tests

* add approval for running gpu tests

* add approval for running gpu tests

* fix unit tests

* fix unit tests

* [Enhancement] refactor base data elment

* fix comment

* fix comment

* fix pop not existing key without error

* [Enhancement] Rename build_from_cfg to from_cfg

* refactor build_logger and build_message_hub

* remove time.sleep from unit tests

* minor fix

* move set_randomness from setup_env

* improve docstring

* refine comments

* print a warning information

* refine comments

* simplify the interface of build_logger

* [Refactor] Add batch_idx to hook input.

* update

* add defaut scope

* Fix docstring

* override get_current_instance method in DefaultScope

clean meta nameing

* remove default mmengine argument of DefaltScope

remove default mmengine argument of DefaltScope

remove default mmengine argument of DefaltScope

* Fix unit test

Fix unit test

* Fix example in docstring

* add explaination of DefaultScope

* rename global accessible and intergration get_sintance and create_instance

* move ManagerMixin to utils

* fix as docstring and seporate get_instance to get_instance and get_current_instance

* fix lint

* fix docstring, rename and move test_global_meta

* fix manager's runtime error description

fix manager's runtime error description

* Add comments

* Add comments

* [Enhancement] Provide MultiProcessTestCase to test distributed related modules

* remove debugging info

* add timeout property

* [Feature]: Add dist semantics in checkpoint hook

* [Fix]: Delete sync buffer in checkpoint hook

* [Feature] Add Runner and Loop

* refine docstring

* refine docstring

* refine __init__ of Runner

* add Runner.save_checkpoint

* add comment for data_batch

* rename validation_cfg to val_cfg

* update branch

* update branch

* discard wear reference

* set seed for torch in dataloader worker

* refine comments

* reorder methods

* import module in __init__.py

* add runner.load_checkpoint

* rename attributes

* fix indent

* fix indent

* add comment for LOOPS

* add example for methods

* add example for methods

* refine examples

* add Runner.resume and refactor register_hooks

* remove type hint of runner in CheckpointHook

* rename before_run to before_train

* remove collate

* add before_run after_run for loop.run

* dummy collate_fn

* add more unit tests

* move call_hook('before_run') to runner

* minor fix

* add comments for collate_fn

* fix type hint

* refactor logic to load or resume checkpoint

* fix typo

* add comments for IterBasedTrainLoop

* refactor unit tests

* fix unit tests

* refactor

* fix setup_env

* refine

* minor fix

* Merge branch 'main' of github.com:open-mmlab/mmengine into zzd/add-runner

* minor fix

* minor fix

* refine

* refactor unit tests

* fix unit tests

* add launcher property

* add logger, message_hub and writer unit tests

* add cur_dataloader attribute for runner

* fix IterBasedTrainLoop

* add torch.no_grad decorator

* add master_only decorator for save_checkpoint

* add before_test_epoch in TestLoop

* refactor load_or_resume method

* refine docstring

* fix typo

* build_dataloader can handle dataset object

* add dump_config for runner

* collate_fn should not a lambda function

* minor fix

* refine docstring

* fix unit tests

* improve comments

* refine unit tests

* rename collate_fn to pseduo_collate

* add 'TODO' tag

* [Refactor] Refactor interface of checkpointhook

* fix print format

* minor ifx

* Messagehub support update dict values

* Messagehub support update dict values

* fix assertion error message

* [Refactor] Use mmengine distributed in evaluator

* remove 'TODO' comment

* use master_only to decorator _log_train and _log_val

* fix resoloved TODO

fix resoloved TODO

fix resoloved TODO

* fix raise error typo

* ensure log item is python scalar

* Fix hook

* Fix

* Fix docs

* FIx

* Fix

* Fix as comment

* update

* Fix hook

* Fix hook

* Fix hook

* Fix itertimerhook

* Fix iter_timer_hook

* Fix

* Fix

* fix logger hook

* Fix loggerhook

* update cur_dataloader

* Fix docstring

* Fix docstring

* Fix as commet

* Fix as commet

* Fix as comment

* rename is_last_epoch, enhance and add after_val before_val .etc

* fix typo in docstring

* remove resolved TODO

* refactor docstring

* [Refactor]: Change scheduler to param_scheduler

* [Fix]: Fix UT of param scheduler hook

Co-authored-by: Your <you@example.com>

* update evaluator prefix

* update docstring and comments

* update doc