• FIX #261: Test server is cleared of all files uploaded during unit testing.
• FIX #447: All files created by unit tests no longer persist in local.
• FIX #608: Fixing dataset_id referenced before assignment error in get_run function.
• FIX #447: All files created by unit tests are deleted after the completion of all unit tests.
• FIX #589: Fixing a bug that did not successfully upload the columns to ignore when creating and publishing a dataset.
• FIX #608: Fixing dataset_id referenced before assignment error in get_run function.
• DOC #639: More descriptive documention for function to convert array format.
• ADD #687: Adds a function to retrieve the list of evaluation measures available.
• ADD #695: A function to retrieve all the data quality measures available.
• ADD #412: Add a function to trim flow names for scikit-learn flows.
• ADD #715: list_evaluations now has an option to sort evaluations by score (value).
• ADD #722: Automatic reinstantiation of flow in run_model_on_task. Clearer errors if that's not possible.
• MAINT #726: Update examples to remove deprecation warnings from scikit-learn

• ADD #560: OpenML-Python can now handle regression tasks as well.
• ADD #620, #628, #632, #649, #682: Full support for studies and distinguishes suites from studies.
• ADD #607: Tasks can now be created and uploaded.
• ADD #647, #673: Introduced the extension interface. This provides an easy way to create a hook for machine learning packages to perform e.g. automated runs.
• ADD #548, #646, #676: Support for Pandas DataFrame and SparseDataFrame
• ADD #662: Results of listing functions can now be returned as pandas.DataFrame.
• ADD #59: Datasets can now also be retrieved by name.
• ADD #672: Add timing measurements for runs, when possible.
• ADD #661: Upload time and error messages now displayed with list_runs.
• ADD #644: Datasets can now be downloaded 'lazily', retrieving only metadata at first, and the full dataset only when necessary.
• ADD #659: Lazy loading of task splits.
• ADD #516: run_flow_on_task flow uploading is now optional.
• ADD #680: Adds openml.config.start_using_configuration_for_example (and resp. stop) to easily connect to the test server.
• ADD #75, #653: Adds a pretty print for objects of the top-level classes.
• FIX #642: check_datasets_active now correctly also returns active status of deactivated datasets.
• FIX #304, #636: Allow serialization of numpy datatypes and list of lists of more types (e.g. bools, ints) for flows.
• FIX #651: Fixed a bug that would prevent openml-python from finding the user's config file.
• FIX #693: OpenML-Python uses liac-arff instead of scipy.io for loading task splits now.
• DOC #678: Better color scheme for code examples in documentation.
• DOC #681: Small improvements and removing list of missing functions.
• DOC #684: Add notice to examples that connect to the test server.
• DOC #688: Add new example on retrieving evaluations.
• DOC #691: Update contributing guidelines to use Github draft feature instead of tags in title.
• DOC #692: All functions are documented now.
• MAINT #184: Dropping Python2 support.
• MAINT #596: Fewer dependencies for regular pip install.
• MAINT #652: Numpy and Scipy are no longer required before installation.
• MAINT #655: Lazy loading is now preferred in unit tests.
• MAINT #667: Different tag functions now share code.
• MAINT #666: More descriptive error message for TypeError in list_runs.
• MAINT #668: Fix some type hints.
• MAINT #677: dataset.get_data now has consistent behavior in its return type.
• MAINT #686: Adds ignore directives for several mypy folders.
• MAINT #629, #630: Code now adheres to single PEP8 standard.

• ADD #440: Improved dataset upload.
• ADD #545, #583: Allow uploading a dataset from a pandas DataFrame.
• ADD #528: New functions to update the status of a dataset.
• ADD #523: Support for scikit-learn 0.20's new ColumnTransformer.
• ADD #459: Enhanced support to store runs on disk prior to uploading them to OpenML.
• ADD #564: New helpers to access the structure of a flow (and find its subflows).
• ADD #618: The software will from now on retry to connect to the server if a connection failed. The number of retries can be configured.
• FIX #538: Support loading clustering tasks.
• FIX #464: Fixes a bug related to listing functions (returns correct listing size).
• FIX #580: Listing function now works properly when there are less results than requested.
• FIX #571: Fixes an issue where tasks could not be downloaded in parallel.
• FIX #536: Flows can now be printed when the flow name is None.
• FIX #504: Better support for hierarchical hyperparameters when uploading scikit-learn's grid and random search.
• FIX #569: Less strict checking of flow dependencies when loading flows.
• FIX #431: Pickle of task splits are no longer cached.
• DOC #540: More examples for dataset uploading.
• DOC #554: Remove the doubled progress entry from the docs.
• MAINT #613: Utilize the latest updates in OpenML evaluation listings.
• MAINT #482: Cleaner interface for handling search traces.
• MAINT #557: Continuous integration works for scikit-learn 0.18-0.20.
• MAINT #542: Continuous integration now runs python3.7 as well.
• MAINT #535: Continuous integration now enforces PEP8 compliance for new code.
• MAINT #527: Replace deprecated nose by pytest.
• MAINT #510: Documentation is now built by travis-ci instead of circle-ci.
• MAINT: Completely re-designed documentation built on sphinx gallery.
• MAINT #462: Appveyor CI support.
• MAINT #477: Improve error handling for issue #479: the OpenML connector fails earlier and with a better error message when failing to create a flow from the OpenML description.
• MAINT #561: Improve documentation on running specific unit tests.

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• Add this changelog
• 2nd example notebook PyOpenML.ipynb
• Pagination support for list datasets and list tasks

There is no changelog for prior versions.