DOCS-#6949: Create Modin on Dask cluster tutorial

[Retribution98]

What do these changes do?

• first commit message and PR title follow format outlined here

  NOTE: If you edit the PR title to match this format, you need to add another commit (even if it's empty) or amend your last commit for the CI job that checks the PR title to pick up the new PR title.

• passes flake8 modin/ asv_bench/benchmarks scripts/doc_checker.py
• passes black --check modin/ asv_bench/benchmarks scripts/doc_checker.py
• signed commit with git commit -s
• Resolves Create Modin on Dask cluster tutorial #6949
• tests added and passing
• module layout described at docs/development/architecture.rst is up-to-date

[YarShev]

What about aws configure? Is there such an option?

[Retribution98]

I think no, because aws configure requires interactive mode, but this is not possible for Jupyter Notebook.

[YarShev]

Should these be empty strings? If not, Let's specify "<aws_access_key_id>", "<aws_secret_access_key>", "<aws_session_token>".

[Retribution98]

If these strings are empty, connection to the AWS will be failed.
Ok, let's specify this as you suggest.

[YarShev]

Suggested change

	" try:\n",
	" dir_name = os.path.dirname(file_path)\n",
	" if not os.path.exists(dir_name):\n",
	" os.makedirs(dir_name)\n",
	" if os.path.exists(file_path): # os.path.isfile(file_path):\n",
	" return \"File has already existed.\"\n",
	" else:\n",
	" urllib.request.urlretrieve(file_url, file_path)\n",
	" return \"OK\"\n",
	" except Exception as ex:\n",
	" return str(ex)"
	" os.makedirs(filepath, exist_ok=True)
	" urllib.request.urlretrieve(file_url, file_path)

Can we use something like this?

[Retribution98]

We can, but in this case we will have some problems:

• if any exception is raised we won't receive any messages (Dask worker doesn't send any outputs so it must be managed by user)
• Since this function may be called more than once. we mast guarantee the correct and predictable result.

In my opinion my suggestion is better.

[YarShev]

@anmyachev, any comments?

[anmyachev]

LGTM!