KevinGG opened a new pull request #11276: [BEAM-7923] An indicator of progress in notebooks URL: https://github.com/apache/beam/pull/11276 1. The problem: when an intended blocking call such as `show`, `collect` or `head` is invoked, the user sometimes doesn't realize the code is still running and blocking. Also, the `*` prompts in notebooks are easily ignored and sometimes buggy. We need an obvious progress indicator to tell the user that the data/pipeline is being processed and potentially expose more metrics about running pipelines through the mechanism. 2. Added a ProgressIndicator class that functions as a context manager to display/remove a spinner on entering/exiting a blocking code execution. 3. Added a progress_indicated decorator to make any callable adapt the ProgressIndicator. 4. When in notebooks, a spinner is displayed. When in ipython but without frontends, texts will be displayed on entering/exiting. Otherwise, NOOP. **Please** add a meaningful description for your change here ------------------------ Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily: - [ ] [**Choose reviewer(s)**](https://beam.apache.org/contribute/#make-your-change) and mention them in a comment (`R: @username`). - [ ] Format the pull request title like `[BEAM-XXX] Fixes bug in ApproximateQuantiles`, where you replace `BEAM-XXX` with the appropriate JIRA issue, if applicable. This will automatically link the pull request to the issue. - [ ] Update `CHANGES.md` with noteworthy changes. - [ ] If this contribution is large, please file an Apache [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf). See the [Contributor Guide](https://beam.apache.org/contribute) for more tips on [how to make review process smoother](https://beam.apache.org/contribute/#make-reviewers-job-easier). 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