Drop 'six' moduleDrop 'u"' prefixes for textRemove other Python 2.7 workaroundsDrop use of 'pytz'Dxpand range to allow 'google-auth' 2.x versionsRemove 'general_helpers.wraps': except for a backward-compatibilityimport, 'functools.wraps' does everything wee need on Python >= 3.6.Remove 'packaging' dependencyRelease-As: 2.0.0b1Closes#74.Closes#215.

Seehttps://github.com/googleapis/repo-automation-bots/blob/63c858e539e1f4d9bb8ea66e12f9c0a0de5fef55/packages/sync-repo-settings/src/required-checks.json#L40-L50 for defaults.

Source-Link:googleapis/synthtool@7e1f6daPost-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:a1a891041baa4ffbe1a809ac1b8b9b4a71887293c9101c88e8e255943c5aec2d

Rely on the pins in 'setup.py' as the Source of Truth.See#234 (review)

Source-Link:googleapis/synthtool@facee4cPost-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:9743664022bd63a8084be67f144898314c7ca12f0a03e422ac17c733c129d803Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Fixes#185 🦕

🤖 I have created a release \*beep\* \*boop\*---## [2.0.0](https://www.github.com/googleapis/python-api-core/compare/v2.0.0-b1...v2.0.0) (2021-08-18)### ⚠ BREAKING CHANGES* drop support for Python 2.7 / 3.5 ([#212](https://www.github.com/googleapis/python-api-core/issues/212)) ([a30f004](https://www.github.com/googleapis/python-api-core/commit/a30f004e74f709d46e905dd819c71f43354e9ac9))### Bug Fixes* bump grpcio version to use stable aio API ([#234](https://www.github.com/googleapis/python-api-core/issues/234)) ([bdbf889](https://www.github.com/googleapis/python-api-core/commit/bdbf889210b709d7c1945f2160bcba9161b4dd2e))* strip trailing _ from field mask paths ([#228](https://www.github.com/googleapis/python-api-core/issues/228)) ([ff6ef1b](https://www.github.com/googleapis/python-api-core/commit/ff6ef1bd07fa68307b7c82c910416d770e7b3416))---This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

Closes#260

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

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

chore: removing owlbot directives for conversion to main

* feat: add grpc transcoding + tests* 🦉 Updates from OwlBotSeehttps://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md* chore: tweak for clarity / idiomatic usage* chore: attempt to appease Sphinx* feat: add grpc transcoding + tests* Add functions to properly handle subfields* Add unit tests for get_field and delete_field.* Add function docstrings and incorporate correct native dict functions.* Add function docstrings and incorporate correct native dict functions.* Increase code coverage* Increase code coverage* Increase code coverage* Reformat filesCo-authored-by: Yonatan Getahun <yonmg@google.com>Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>Co-authored-by: Tres Seaver <tseaver@palladion.com>

…275)Co-authored-by: Kenneth Bandes <kbandes@google.com>

chore: relocate owl bot post processor

…281)

…282)* chore: add default_version and codeowner_team to .repo-metadata.json* Assign@googleapis/actools-python as codeowner

…le (#283)Source-Link:googleapis/synthtool@a7ed11ePost-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:6e7328583be8edd3ba8f35311c76a1ecbc823010279ccb6ab46b7a76e25eafccCo-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Fix new deprecation warning for 'threading.Condition.notifyAll'.

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…430)Source-Link:googleapis/synthtool@fdba3edPost-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:1f0dbd02745fb7cf255563dab5968345989308544e52b7f460deadd5e78e63b0

docs: add a note that grpcio-gcp is only supported in environments with protobuf < 4.x.xdocs: raise DeprecationWarning when 'grpcio-gcp' is usedfix(deps): require protobuf >= 3.20.1

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* feat: add 'strict' to flatten_query_params to lower-case bools* pylintCo-authored-by: Anthonios Partheniou <partheniou@google.com>

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Source-Link:googleapis/synthtool@56da63ePost-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:993a058718e84a82fda04c3177e58f0a43281a996c7c395e0a56ccc4d6d210d7

* fix: Improve transcodding error messageThisfixes#441 and#440. Also, with this change we stop outputting the whole request message in transcodding erro message to prevent leaking any confidential information from a request message in a form of an error in a log message.* reformat code with black

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* chore: exclude requirements.txt file from renovate-botSource-Link:googleapis/synthtool@f58d313Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:7a40313731a7cb1454eef6b33d3446ebb121836738dc3ab3d2d3ded5268c35b6* update constraints files* fix(deps): require protobuf 3.20.2Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>Co-authored-by: Anthonios Partheniou <partheniou@google.com>

* fix(deps): allow protobuf 3.19.5* explicitly exclude protobuf 4.21.0* chore: use a compatible version of protobuf for testing

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* fix: Major refactoring and fix for Polling, Retry and Timeout logicThis is in response tohttps://freeman.vc/notes/aws-vs-gcp-reliability-is-wildly-different, which triggered an investigation of the whole Polling/Retry/Timeout behavior in Python GAPIC clients and revealed many fundamental flaws in its implementaiton.To properly describe the refactoring this PR does we need to stick to a rigorous terminology, as vague definitions of retries, timeouts, polling and related concepts seems to be the main source of the present bugs and overal confusion among both groups: users of the library and creators of the library. Please check the documentation of the `google.api_core.retry.Retry` class the `google.api_core.future.polling.Polling.result()` method for the proper definitions and context.Note, the overall semantics around Polling, Retry and Timeout remains quite confusing even after refactoring (although it is now more or less rigorously defined), but it was clean as I could make it while still maintaining backward compatibility of the whole library.The quick summary of the changes in this PR:1) Properly define and fix the application of Deadline and Timeout concepts. Please check the updated documentation for the `google.api_core.retry.Retry` class for the actual definitions. Originally the `deadline` has been used to represent timeouts conflating the two concepts. As result this PR replaces `deadline` arguments with `timeout` ones in as backward-compatible manner as possible (i.e. backward compatible in all practical applications).2) Properly define RPC Timeout, Retry Timeout and Pollint Timeout and how a generic Timeout concept (aka Logical Timeout) is mapped to one of those depending on the context. Please check `google.api_core.retry.Retry` class documentation for details.3) Properly define and fix the application of Retry and Polling concepts. Please check the updated documentation for `google.api_core.future.polling.PollingFuture.result()` for details.4) Separate `retry` and `polling` configurations for Polling future, as these are two different concepts (although both operating on `Retry` class). Originally both retry and polling configurations were controlled by a single `retry` parameter, merging configuration regarding how "rpc error responses" and how "operation not completed" responses are supposed to be handled.5) For the following config properties - `Retry (including `Retry Timeout`), `Polling` (including `Polling Timeout`) and `RPC Timeout` - fix and properly define how each of the above properties gets configured and which config gets precedence in case of a conflict (check `PollingFuture.result()` method documentation for details). Each of those properties can be specified as follows: directly provided by the user for each call, specified during gapic generation time from config values in `grpc_service_config.json` file (for Retry and RPC Timeout) and `gapic.yaml` file (for Polling), or be provided as a hard-coded basic default values in python-api-core library itself.6) Fix the per-call polling config propagation logic (the polling/retry configs supplied to `PollingFuture.result()` used to be ignored for actual call).7) Deprecate the usage of `deadline` terminology in the whole library and backward-compatibly replace it with timeout. This is essential as what has been called "deadline" in this library was actually "timeout" as it is defined in `google.api_core.retry.Retry` class documentation.8) Deprecate `ExponentialTimeout`, `ConstantTimeout` and related logic as those are outdated concepts and are not consistent with the other GAPIC Languages. Replace it with `TimeToDeadlineTimeout` to be consistent with how the rest of the languages do it.9) Deprecate `google.api_core.operations_v1.config` as it is an outdated concept and self-inconsistent (as all gapic clients provide configuraiton in code). The configs are directly provided in code instead.10) Switch randomized delay calculation from `delay` being treated as expected value for randomized_delay to `delay` being treated as maximum value for `randomized_delay` (i.e. the new expected valud for `randomized_delay` is `delay / 2`). See the `exponential_sleep_generator()` method implementation for details. This is needed to make Python implementation of retries and polling exponential backoff consistent with the rest of GAPIC languages. Also fix the uncontrollable growth of `delay` value (since it is a subject of exponential growth, the `delay` value was quickly reaching "infinity" value, and the whole thing was not failing simply due to python being a very forgiving language which forgives multiplying "infinity" by a number (`inf * number = inf`) binstead of simply overflowing to a (most likely) negative number).11) Fix url construction in `OperationsRestTransport`. Without this fix the polling logic for REST transport was completely broken (is not affecting Compute client, as that one has custom LRO).12) Las but not least: change the default values for Polling logic to be the following: `initial=1.0` (same as before), `maximum=20.0` (was `60`), `multiplier=1.5` (was `2.0`), `timeout=900` (was `120`, but due to timeout resolution logic was actually None (i.e. infinity)). This, in conjunction with changed calculation of randomized delay (i.e. its expected value now being  `delay / 2`) overall makes polling logic much less aggressive in terms of increasing delays between each polling iteration, making LRO return much earlier for users on average, but still keeping a healthy balance between strain put on both client and server by polling and responsiveness of LROs for user.*The design doc summarising all the changes and reasons for them is in progress.* fix ci failures (mainly sphinx errors)* remove unused code* fix typo* Pin pytest version to <7.2.0* reformat code* address pr feedback* address PR feedback* address pr feedback* Update google/api_core/future/polling.pyCo-authored-by: Victor Chudnovsky <vchudnov@google.com>* Apply documentation suggestions from code reviewCo-authored-by: Victor Chudnovsky <vchudnov@google.com>* Address PR feedbackCo-authored-by: Victor Chudnovsky <vchudnov@google.com>

* bump google-auth version to 2.13.0* chore: set minimum to 2.14.1 insteadCo-authored-by: Anthonios Partheniou <partheniou@google.com>

…pprove] (#464)* chore(python): update dependencies in .kokoro/requirements.txtSource-Link:googleapis/synthtool@e3a1277Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:452901c74a22f9b9a3bd02bce780b8e8805c97270d424684bff809ce5be8c2a2* 🦉 Updates from OwlBot post-processorSeehttps://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md* exclude templated lint github action* 🦉 Updates from OwlBot post-processorSeehttps://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md* fix typoCo-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>Co-authored-by: Anthonios Partheniou <partheniou@google.com>

* feat: add support for Python 3.11Signed-off-by: Daniel Ziegenberg <daniel@ziegenberg.at>* restore check for unit-3.10_wo_grpc* restore check for unit_wo_grpc-3.10* restore 3.10 test* require grpcio 1.49.1 with python 3.11* lintSigned-off-by: Daniel Ziegenberg <daniel@ziegenberg.at>Co-authored-by: Anthonios Partheniou <partheniou@google.com>

…in headers (#465)* feat: Allow non-fully-qualified enums in routing headers* Rename s/fully_qualified_enums/qualified_enums/g for correctness* chore: minor tweaks* chore: Temporary workaround for pytest in noxfile.* Fix import order* bring coverage to 100%* lint* 🦉 Updates from OwlBot post-processorSeehttps://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md* remove replacement in owlbot.py causing lint failureCo-authored-by: Anthonios Partheniou <partheniou@google.com>Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

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* chore(python): drop flake8-import-order in samples noxfileSource-Link:googleapis/synthtool@6ed3a83Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:3abfa0f1886adaf0b83f07cb117b24a639ea1cb9cffe56d43280b977033563eb* drop flake8-import-order* lint* use python 3.9 for docs* resolve mypy error* update python version for lint* fix lint* fix lintCo-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>Co-authored-by: Anthonios Partheniou <partheniou@google.com>