* docs: add sample for dataset copy

* add google-cloud-bigquery to test requirements

* use relative imports to hopefully fix lint

…v3 (#81)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [google-cloud-bigquery-datatransfer](https://togithub.com/googleapis/python-bigquery-datatransfer) | major | `==2.1.0` -> `==3.0.0` |

---

### Release Notes

<details>
<summary>googleapis/python-bigquery-datatransfer</summary>

### [`v3.0.0`](https://togithub.com/googleapis/python-bigquery-datatransfer/blob/master/CHANGELOG.md#&#8203;300-httpswwwgithubcomgoogleapispython-bigquery-datatransfercomparev210v300-2020-12-09)

[Compare Source](https://togithub.com/googleapis/python-bigquery-datatransfer/compare/v2.1.0...v3.0.0)

##### ⚠ BREAKING CHANGES

-   type is renamed to type\_ to avoid conflict with built-in functions (introduced in [googleapis/gapic-generator-python#&#8203;595](https://togithub.com/googleapis/gapic-generator-python/issues/595))

##### Features

-   add common resource path helpers ([#&#8203;69](https://www.github.com/googleapis/python-bigquery-datatransfer/issues/69)) ([e0bcedb](https://www.github.com/googleapis/python-bigquery-datatransfer/commit/e0bcedb58109e38a58584d5b3087f03e1fa10835))

##### Bug Fixes

-   avoid collision with built-in functions by renaming type property to type\_ ([#&#8203;53](https://www.github.com/googleapis/python-bigquery-datatransfer/issues/53)) ([b954411](https://www.github.com/googleapis/python-bigquery-datatransfer/commit/b95441140f7c86dd3e833aef0532badd6280ef48)), closes [/github.com/googleapis/python-talent/blob/ef045e8eb348db36d7a2a611e6f26b11530d273b/samples/snippets/noxfile_config.py#L27-L32](https://www.github.com/googleapis//github.com/googleapis/python-talent/blob/ef045e8eb348db36d7a2a611e6f26b11530d273b/samples/snippets/noxfile_config.py/issues/L27-L32)

##### Documentation

-   update intersphinx links ([#&#8203;78](https://www.github.com/googleapis/python-bigquery-datatransfer/issues/78)) ([a78ba39](https://www.github.com/googleapis/python-bigquery-datatransfer/commit/a78ba39bf1507cbc9e2a51fe4553d602da7f7601))

</details>

---

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See samples/ directory for maintained and tested samples

PiperOrigin-RevId: 347055288

* docs: add scheduled query samples

* test: opt-out of type annotations for now

* test: use environment variable for project ID

* set quota project

* consolidate config creation to conserve quota

* test: add system tests for mTLS testing

* Update tests/system.py

…4.0 (#87)

Co-authored-by: Tres Seaver <tseaver@palladion.com>

Source-Author: WhiteSource Renovate <bot@renovateapp.com>
Source-Date: Wed Dec 16 18:13:24 2020 +0100
Source-Repo: googleapis/synthtool
Source-Sha: aa255b15d52b6d8950cca48cfdf58f7d27a60c8a
Source-Link: googleapis/synthtool@aa255b1

#89)

Closes #787

Source-Author: Tres Seaver <tseaver@palladion.com>
Source-Date: Thu Dec 17 16:08:02 2020 -0500
Source-Repo: googleapis/synthtool
Source-Sha: b670a77a454f415d247907908e8ee7943e06d718
Source-Link: googleapis/synthtool@b670a77

The samples tests create `.nox` directories
with all dependencies installed. These directories
should be excluded from linting.

I've tested this change locally, and it significantly
speeds up linting on my machine.

Source-Author: Tim Swast <swast@google.com>
Source-Date: Tue Dec 22 13:04:04 2020 -0600
Source-Repo: googleapis/synthtool
Source-Sha: 373861061648b5fe5e0ac4f8a38b32d639ee93e4
Source-Link: googleapis/synthtool@3738610

* chore: add comnstraints file

* chore: add comnstraints file

* chore: add comnstraints file

* chore: add comnstraints file

* chore: add comnstraints file

* chore: add comnstraints file

* chore(python): fix column sizing issue in docs

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Thu Jan 7 11:58:32 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: f15b57ccfd71106c2299e9b89835fe6e55015662
Source-Link: googleapis/synthtool@f15b57c

* chore(python): use 'http' in LICENSE

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

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Thu Jan 7 13:05:12 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 41a4e56982620d3edcf110d76f4fcdfdec471ac8
Source-Link: googleapis/synthtool@41a4e56

* chore(python): skip docfx in main presubmit

* chore(python): skip docfx in main presubmit

* fix: properly template the repo name

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Fri Jan 8 10:32:13 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: fb53b6fb373b7c3edf4e55f3e8036bc6d73fa483
Source-Link: googleapis/synthtool@fb53b6f

* chore: add missing quotation mark

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Mon Jan 11 09:43:06 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 16ec872dd898d7de6e1822badfac32484b5d9031
Source-Link: googleapis/synthtool@16ec872

* NOX_SESSION is optional

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

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* chore: add 3.9 to noxfile template

Since the python-docs-samples noxfile-template doesn't sync with this, I wanted to make sure the noxfile template matched the most recent change [here](https://github.com/GoogleCloudPlatform/python-docs-samples/pull/4968/files)

cc @tmatsuo

Source-Author: Leah E. Cole <6719667+leahecole@users.noreply.github.com>
Source-Date: Fri Jan 15 17:24:05 2021 -0800
Source-Repo: googleapis/synthtool
Source-Sha: 56ddc68f36b32341e9f22c2c59b4ce6aa3ba635f
Source-Link: googleapis/synthtool@56ddc68

* build(python): make `NOX_SESSION` optional

I added this accidentally in #889. `NOX_SESSION` should be passed down if it is set but not marked required.

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Tue Jan 19 09:38:04 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: ba960d730416fe05c50547e975ce79fcee52c671
Source-Link: googleapis/synthtool@ba960d7

* chore: Add header checker config to python library synth

Now that we have it working in [python-docs-samples](https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/.github/header-checker-lint.yml) we should consider adding it to the 🐍 libraries :)

Source-Author: Leah E. Cole <6719667+leahecole@users.noreply.github.com>
Source-Date: Mon Jan 25 13:24:08 2021 -0800
Source-Repo: googleapis/synthtool
Source-Sha: 573f7655311b553a937f9123bee17bf78497db95
Source-Link: googleapis/synthtool@573f765

* chore: add noxfile parameters for extra dependencies

Also, add tests for some noxfile parameters for assurance that the
template generates valid Python.

Co-authored-by: Jeffrey Rennie <rennie@google.com>

Source-Author: Tim Swast <swast@google.com>
Source-Date: Tue Jan 26 12:26:57 2021 -0600
Source-Repo: googleapis/synthtool
Source-Sha: 778d8beae28d6d87eb01fdc839a4b4d966ed2ebe
Source-Link: googleapis/synthtool@778d8be

* build: migrate to flakybot

Source-Author: Justin Beckwith <justin.beckwith@gmail.com>
Source-Date: Thu Jan 28 22:22:38 2021 -0800
Source-Repo: googleapis/synthtool
Source-Sha: d1bb9173100f62c0cfc8f3138b62241e7f47ca6a
Source-Link: googleapis/synthtool@d1bb917

* chore(python): include py.typed files in release

A py.typed file must be included in the released package for it to be considered typed by type checkers. https://www.python.org/dev/peps/pep-0561/#packaging-type-information. See googleapis/python-secret-manager#79

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Fri Feb 5 17:32:06 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: 33366574ffb9e11737b3547eb6f020ecae0536e8
Source-Link: googleapis/synthtool@3336657

* docs: update python contributing guide

Adds details about blacken, updates version for system tests,
and shows how to pass through pytest arguments.

Source-Author: Chris Cotter <cjcotter@google.com>
Source-Date: Mon Feb 8 17:13:36 2021 -0500
Source-Repo: googleapis/synthtool
Source-Sha: 4679e7e415221f03ff2a71e3ffad75b9ec41d87e
Source-Link: googleapis/synthtool@4679e7e

This PR was generated using Autosynth. 🌈

Synth log will be available here:
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- [ ] To automatically regenerate this PR, check this box.

PiperOrigin-RevId: 350246057
Source-Link: googleapis/googleapis@5206824

Source-Author: Bu Sun Kim <8822365+busunkim96@users.noreply.github.com>
Source-Date: Wed Feb 17 14:10:46 2021 -0700
Source-Repo: googleapis/synthtool
Source-Sha: d17674372e27fb8f23013935e794aa37502071aa
Source-Link: googleapis/synthtool@d176743

This PR was generated using Autosynth. 🌈

Synth log will be available here:
https://source.cloud.google.com/results/invocations/f169e545-1f46-4498-92b8-ef79af1ecedc/targets

- [ ] To automatically regenerate this PR, check this box.

Source-Link: googleapis/synthtool@0780323

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>