* init information retrieval metrics
* changed retrieval metrics names, expanded arguments and fixed typo
* added 'Retrieval' prefix to metrics and fixed conflict with already-present 'average_precision' file
* improved code formatting
* pep8 code compatibility
* features/implemented new Mean Average Precision metrics for Information Retrieval + doc
* fixed pep8 compatibility
* removed threshold parameter and fixed typo on types in RetrievalMAP and improved doc
* improved doc, put first class-specific args in RetrievalMetric and transformed RetrievalMetric in abstract class
* implemented tests for functional and class metric. fixed typo when input tensors are empty or when all targets are False
* fixed typos in doc and changed torch.true_divide to torch.div
* fixed typos pep8 compatibility
* fixed types in long division in ir_average_precision and example in mean_average_precision
* RetrievalMetric states are not lists and _metric method accepts predictions and targets for easier extension
* updated CHANGELOG file
* added '# noqa: F401' flag to not used imports
* added double space before '# noqa: F401' flag
* Update CHANGELOG.md
Co-authored-by: Jirka Borovec <Borda@users.noreply.github.com>
* change get_mini_groups in get_group_indexes
* added checks on target inputs
* minor refactoring for code cleanness
* split tests over exception raising in separate function && refactored test code into multiple functions
* fixed pep8 compatibility
* implemented suggestions of @SkafteNicki
* fixed imports for isort and added types annontations to functions in test_map.py
* isort on test_map and fixed typing
* isort on retrieval and on __init__.py and utils.py in metrics package
* fixed typo in pytorch_lightning/metrics/__init__.py regarding code style
* fixed yapf compatibility
* fixed yapf compatibility
* fixed typo in doc
Co-authored-by: Jirka Borovec <Borda@users.noreply.github.com>
Co-authored-by: Nicki Skafte <skaftenicki@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Jirka Borovec