* feat: allow cell magic body to be a $variable

* Fix missing indefinitive article in error msg

* Adjust test assertion to error message change

* Refactor logic for extracting query variable

* Explicitly warn about missing query variable name

* Thest the query "variable" is not identifier case

…eapis#1073)

* feat: promote `to_arrow_iterable` to public method

* use correct version number

* Update google/cloud/bigquery/table.py

Co-authored-by: Tim Swast <swast@google.com>

* fix: apply timeout to all resumable upload requests

* Fix stub in test case

* Improve timeout type and other type annotations

* Annnotate return type of _do_resumable_upload()

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…taFrame (googleapis#1078)

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Towards #1076 🦕
(edit: moved to googleapis/python-db-dtypes-pandas#45 )

* revoke dataset access setup

* basic template for sample

* sample + test

* revoke dataset access sample

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/master/packages/owl-bot/README.md

* docs: add sample for revoking dataset access - update year and string formatting

* docs: add sample for revoking dataset access - move to snippets and change parameter pattern for readibility

* moving update_dataset to /snippets and adjusting imports on both revoke_access and update_access

* Update samples/snippets/revoke_dataset_access.py

removed nested START/END tags

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* Update samples/snippets/revoke_dataset_access.py

update readability in API request

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* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/master/packages/owl-bot/README.md

* updated test

* 🦉 Updates from OwlBot

See https://github.com/googleapis/repo-automation-bots/blob/master/packages/owl-bot/README.md

* change after running test

* resolving linting failure, rewriting test

* removed relative import errors

* remove relative mport from update_dataset_access

* adding fixture to conftest.py

* updated sample

* updating sample to match new update_access sample

* fixing region tags

* consolidated tests into one file for both methods

* updating test to full_dataset format

* updated revoke sample

* updating test

* refactored sample

* Update samples/snippets/conftest.py

* Update samples/snippets/revoke_dataset_access.py

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* Update samples/snippets/update_dataset_access.py

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* Update samples/snippets/revoke_dataset_access.py

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* Update samples/snippets/revoke_dataset_access.py

Co-authored-by: Tim Swast <swast@google.com>

* refactoring entry

* added comment for entry access

* Update samples/snippets/README.rst

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* Update samples/snippets/dataset_access_test.py

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* Update samples/snippets/dataset_access_test.py

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* added develper TODO in sample

* add comments to samples

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Samples use the code from the core library, but mypy complains about
calling an untyped function in a typed context, thus some additional
type annotations need to be added.