* update type hint and ut for evaluator

* update doc

* fix

* support metric prefix in BaseEvaluator

* update docs

* use class attribute default_prefix

* [Feature] Add distributed module

* fix IS_DIST error

* all_reduce_dict does operations in-place

* support 'mean' operation

* provide local group process

* add tmpdir argument for collect_results

* add unit tests

* refactor unit tests

* simplify steps to create multiple processes

* minor fix

* describe the different of *gather* in mmengine and pytorch

* minor fix

* add unit tests for nccl

* test nccl backend in multiple gpu

* add get_default_group function to handle different torch versions

* minor fix

* [Feature] Add distributed module

* fix IS_DIST error

* all_reduce_dict does operations in-place

* support 'mean' operation

* provide local group process

* add tmpdir argument for collect_results

* add unit tests

* refactor unit tests

* simplify steps to create multiple processes

* minor fix

* describe the different of *gather* in mmengine and pytorch

* minor fix

* add unit tests for nccl

* test nccl backend in multiple gpu

* add get_default_group function to handle different torch versions

* minor fix

* minor fix

* handle torch1.5

* handle torch1.5

* minor fix

* fix typo

* refactor unit tests

* nccl does not support gather and gather_object

* fix gather

* fix collect_results_cpu

* fix collect_results and refactor unit tests

* fix collect_results unit tests

* handle torch.cat in torch1.5

* refine docstring

* refine docstring

* fix comments

* fix comments

* add user docs for get_config/get_models

* resolve comments

* [Doc] Add runner tutorial.

* update

* add advanced doc

* refine and add flow chart

* update

* update

* [Feature]: Add sampler seed hook

* [Fix]: Add call with to UT

* add evaluator unittest

* update composed evaluator cfg

* add building function

* resolve comments

* resolve comments

* resolve comments

* fix evaluator doc

* [Docs] Add hooks tutorial

* improve the description about hooks

* Add OptimizerHook usages

* fix comments

* fix comments

* fix comments

* fix comments

* fix typo

* refine description

* refactor

* refactor

* add a sentence to improve docs

* briefly introduce the hook of pytorch

* refactor the order of sections

* improve the description about hooks

* improve

* fix comments

* update priorities

* improve description

* refactor title

* fix typo

* reorder priority of hook

* fix typo

* fix comments

* remove the distributed argument from SyncBuffersHook

* first commit

* add logging doc

* add logging doc

* Fix lint

* Fix typo

* add logging

* update docs

* update logging.md

* update logging.md

* scale img

* update logging docs

* Fix as comment

* Fix as comment

* Fix as comment

* Fix as comment

Fix as comment

* add introduction to current=True

* Fix as comment

Fix as comment

* Fix as comment

* Fix as comment

* add mmddp

* update

* update code

* update unittest

* fix comment

* add user doc of distributed primitives

* resolve comments

* update

* add evaluator docs

* resolve comments

* resolve comments

* [Feature]: Add evaluator base class.

* solve comments

* update

* fix

* [WIP] abstract-data-structure

* update docs

* update

* update BaseDataSample

* fix comment and coverage 100%

* update and add _set_field

* update

* split  into base_data_element and base_data_sample

* update

* update

* update

* fix typo

* Fix BaseDataset docs

* Fix basedataset doc

* basedataset first commit

* add base dataset

* add dataset

* add basedataset

* Fix test dataset

* Fix mypy and test

* Fix mypy and test

* remove unused code

* Update mmengine/dataset/base_dataset.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Update mmengine/dataset/base_dataset.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* add more corner cases in unittest

* fix lint

* Fix as comment

* Fix lint

* update unitest

* Type hint Dick to dict

* rename max_refetch

* Fix as comment

* Fix typo

* Fix as comment

* BaseDataset is no more an abstrac Class, change UT and docs

* Fix as comment

* Fix as comment and refactor type error

* Add comment for full init

* Fix as comment and modify dataset_wrapper

* Fix as comment and modify dataset_wrapper

* Fix as comment

* Fix as comment

* Fix as comment

* Fix as comment

* Fix as comment

* Fix as comment

* Fix as comment

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>
Co-authored-by: Tao Gong <gongtao950513@gmail.com>

* Add DefaultSampler and InfiniteSampler

* Add unit test

* Add samplers to API reference

* Update docstring

* Improve according to comments

* Rename `num_replicas` to `world_size`

* Update docstring.

* Update mmengine/data/sampler.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Update mmengine/data/sampler.py

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Fix typo in unit test

Co-authored-by: Wenwei Zhang <40779233+ZwwWayne@users.noreply.github.com>
Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* [Feature]: Add optimzier and constructor.

* refactor unit tests

* add optimizer doc

* add parrots wrapper

* add parrots wrapper

* solve comments

* resolve comments

* add visualizer

* update

* update

* update

* update

* update

* fix lint

* fix commit

* fix commit

* fix commit

* fix commit

* refine

* refine

* update

* update

* update

* update

* update

* add unit tests of data abstract interface

* update

* update

* update docs of data element

* a draft of UT of datasample, to be finished

* update datasample test

* updata

* update

* fix comments

* fix comments

* fix comments

Co-authored-by: liukuikun <liukuikun@sensetime.com>

* [Docs] Configure the documentation

* fix the format

* introduce the usage of default_scope

* add Chinese documentation

* move docs configure to another pr

* clean pr

* refactor registry docs

* fix typo

* fix typo

* reorg

* add more examples

* reslove comments

* reslove comments

* reslove comments

Co-authored-by: ZwwWayne <wayne.zw@outlook.com>

* add docs for BaseDataset

* update docs

* update docs

* update basedataset.md

* resolve all comments

* update

* update

* refine base dataset doc

* resolve all comments

* update

* update

* update

* update

* update

* update

* update

Co-authored-by: MeowZheng <meowzheng@outlook.com>

* update isort

* update

* update comments

* update

* update

* update

* fix bug in use cases

* resolve all comments

* add description of basedatasample

* rename meta_info to metainfo as meta is an adj.

* update

* resolve comments

* clean set data

* finished doc

* rephrase

* update

* resolve comments

* more clear organization

* rephrase

* rephrase

* replace 基础数据元素 by 数据元素

* rephrase

* [Doc] Add scheduler user doc.

* reslove comments

* add chinese doc

* add update en doc

* resolve comments

* resolve comments

* update parameter scheduler

* resolve comments

* tmp remove en doc

* resolve comments

* resolve comments

* resolve comments

Co-authored-by: Kai Chen <chenkaidev@gmail.com>

* [Docs] Configure the documentation

* delete mypy.ini

* add config user doc

* add config user doc

* Fix typo

* fix typo

* reference mmcv

* fix typo

* fix typo

* Restructuring config.md

* Update introduction

Co-authored-by: Kai Chen <chenkaidev@gmail.com>

* Fix

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Update docs/zh_cn/tutorials/config.md

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* Fix title level

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

* refactor the doc

* remove **bold** on titles

* Fix python comment

* Fix python comment

* Update docs/zh_cn/tutorials/config.md

Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>

Co-authored-by: Kai Chen <chenkaidev@gmail.com>
Co-authored-by: Zaida Zhou <58739961+zhouzaida@users.noreply.github.com>