Mr-Geekman

### 🚀 Feature Request It can be useful to have a more strict rule about order of columns after `TSDataset.to_flatten`. ### Proposal I propose the following order of columns: *...

Can't pickle the result of `country_holidays`

4

Currently, on Linux it isn't possible to pickle the result of calling `country_holidays`. Code to reproduce: ```python import pickle import holidays def main(): jp_holidays = holidays.country_holidays("JP") result = pickle.dumps(jp_holidays) if...

Add gallery of tutorials divided by level

2

## Before submitting (must do checklist) - [x] Did you read the [contribution guide](https://github.com/tinkoff-ai/etna/blob/master/CONTRIBUTING.md)? - [x] Did you update the docs? We use Numpy format for all the methods and...

Create documentation page with glossary of terms

2

## Before submitting (must do checklist) - [x] Did you read the [contribution guide](https://github.com/tinkoff-ai/etna/blob/master/CONTRIBUTING.md)? - [x] Did you update the docs? We use Numpy format for all the methods and...

### 🚀 Feature Request We should separate our tutorials by level of expertize. We could also create some kind of gallery of them on the Tutorials page like in smth...

Create documentation page with links to external resources

2

## Before submitting (must do checklist) - [x] Did you read the [contribution guide](https://github.com/tinkoff-ai/etna/blob/master/CONTRIBUTING.md)? - [x] Did you update the docs? We use Numpy format for all the methods and...

Add new documentation prototype

3

## Before submitting (must do checklist) - [x] Did you read the [contribution guide](https://github.com/tinkoff-ai/etna/blob/master/CONTRIBUTING.md)? - [x] Did you update the docs? We use Numpy format for all the methods and...

### 🚀 Feature Request We have materials related to etna published on medium/habr, we could add links to them into our documentation. ### Proposal Create page "User Guide / Resources"...

### 🚀 Feature Request We have some kind of glossary in the library, but it isn't explicit. We could make it explicit as a separate documentation page. ### Proposal Add...

Fix `mypy` warnings about untyped functions

1

### 🚀 Feature Request Fix `mypy` warnings about untyped functions, because now it shows warnings like: ``` etna/transforms/decomposition/change_points_based/per_interval_models/constant.py:13: note: By default the bodies of untyped functions are not checked, consider...