Change log

11.0.0 (2022-02-01)

• Android Gradle plugin version 7.1 is now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin version 3.6 is no longer supported.

• Remove warning about untested Android Gradle plugin versions, as they are usually backward compatible.

• Gradle pluginManagement and plugins syntax is now supported.

• Java arrays now support the copy.copy function in Python.

• Passing an unsupported Java object to copy.copy, copy.deepcopy or pickle now fails with a clearer error message.

10.0.1 (2021-09-22)

• Android Gradle plugin versions 4.2 and 7.0 are now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin versions 3.4 and 3.5 are no longer supported.

• [BACKWARD INCOMPATIBLE] The version setting is no longer supported. Simply remove it to use the current version of Python.

• Update to Python version 3.8.11 (see its changelog for details).

• Update to pip version 19.2.3 (see its changelog for details).

• Update CA bundle to certifi 2021.5.30.

• Add a buffer attribute to stdout and stderr for bytes output (#464, #516).

• Java arrays now support the index and count methods in Python. In order to support code with hasattr checks, they also now implement the methods __contains__, __iter__ and __reversed__, rather than relying on the fallback to __getitem__ (#306).

• Fix “truth value of an array with more than one element is ambiguous” error when passing a NumPy array to a method which takes a Java array (#526).

• NumPy integer scalars, and anything else which implements the __index__ method, can now be used as a Java array index (#495).

• Add workaround to help conda Python on Windows find its SSL libraries (#450).

• Fix “invalid literal for int” error in pip_install when project path includes a symlink (#468).

• Fix crash caused by empty files in the APK on Android 7 (Electron Cash #2136).

• importlib.util.spec_from_file_location now works for paths loaded from the APK.

9.1.0 (2021-01-02)

• Fix error “‘HTMLParser’ object has no attribute ‘unescape’” on Python 3.9 (#416).

• Fix error “must supply either home or prefix/exec-prefix – not both” on Homebrew for Mac (#405).

• buildPython path can now contain spaces.

• Java API is now annotated with @NotNull where appropriate.

• Java arrays now support the copy method in Python.

• Fix bug when using cast to call a functional interface which extends another functional interface.

• Update CA bundle to certifi 2020.12.5.

• json module performance improvements.

• Java API performance improvements.

9.0.0 (2020-11-06)

• Android Gradle plugin version 4.1 is now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin version 3.3 is no longer supported.

• Update to Python version 3.8.6 (see its changelog for details).

• Java/Kotlin objects implementing functional interfaces can now be called from Python using () syntax. This includes lambdas, method references, and any interface with a single abstract method, such as java.lang.Runnable.

• Java arrays can now be accessed from Python using negative indices and slice syntax.

• Fix conversion of non-contiguous NumPy arrays to Java arrays.

• Remove inaccessible directories from os.get_exec_path (#346).

• Make zipimport implement the new loader API. This affected the package dateparser.

• If bdist_wheel fails for an unknown reason, fall back on setup.py install. This affected the packages acoustics and kiteconnect (#338).

• Fix ClassNotFoundException when minifyEnabled is in use (#261).

8.0.1 (2020-07-28)

• Make missing multiprocessing primitives throw an exception on use rather than on import. This affected the packages joblib and librosa (#21).

• Make ctypes.util.find_library search libraries installed with pip. This affected the package soundfile (#201).

• Fix “invalid constraint” error affecting the packages openpyxl and webcolors.

8.0.0 (2020-06-15)

• Android Gradle plugin version 4.0 is now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin version 3.2 is no longer supported.

• Update to Python version 3.8.3 (see its changelog for details).

• Using Chaquopy in an Android library module (AAR) is now supported (#94).

• Java primitive arrays now support the Python buffer protocol, allowing high-performance data transfer between the two languages.

• Data files in top-level non-package directories are now extracted from the APK the first time the app is started, so they can be accessed using a path relative to __file__.

7.0.3 (2020-05-11)

• Fix “This platform lacks a functioning sem_open implementation” error when using multiprocessing.dummy.Pool (aka multiprocessing.pool.ThreadPool). This affected many common uses of TensorFlow.

• Work around dynamic linker bug on 64-bit ABIs before API level 23 (#228).

• Fix out of memory error when running Gradle with a small heap size.

• Fix incompatibility with external package importlib_metadata (#276).

• Fix NoClassDefFoundError when using Python to access certain androidx classes, including AppCompatTextView.

• Fix conversion of Java byte[] array to Python bytearray.

• Improve startup speed by deferring pkg_resources initialization until the module is first imported.

• Update CA bundle to certifi 2020.4.5.1.

7.0.2 (2020-03-05)

• [BACKWARD INCOMPATIBLE] Update to Python version 3.8.1 (see the 3.7 and 3.8 release notes for details).

  • All Python standard library modules are now supported except those in this list. In particular, support has been added for bz2, importlib.metadata, importlib.resources and lzma.

  • Most native packages have been upgraded to a more recent version. If you’ve used specific version numbers in a build.gradle or requirements.txt file, you may need to update them. See the repository index for a complete list.

• Android Gradle plugin version 3.6 is now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin version 3.1 is no longer supported.

• [BACKWARD INCOMPATIBLE] buildPython must now be at least Python 3.5.

• Expose Java API using api configuration so it’s available to dynamic feature modules.

• Update CA bundle to certifi 2019.9.11.

• Fix “cannot create a consistent method resolution order” error when using androidx.

• Fix a deadlock involving the Java API.

• Improve local caching of packages which aren’t available as wheels.

• Reduce some temporary filename lengths to avoid the Windows 260-character limit.

• Improve startup speed.

6.3.0 (2019-08-25)

• Android Gradle plugin version 3.5 is now supported.

• Pre-compile Python code to .pyc format by default, so it doesn’t have to be compiled on the device. This significantly improves app startup speed and storage usage.

• Remove the extractPackages setting, as data files are now extracted automatically. See the documentation for details.

• Change data file location from cache to files directory, to prevent the user from clearing it while the app is running.

• Hide importer frames in stack traces, unless the exception originated from the importer itself.

• Fix another metadata parsing issue, this one affecting the package astroid.

• Fix “has no DT_SONAME” warning (#112).

6.2.1 (2019-04-19)

• Android Gradle plugin version 3.4 is now supported.

• Update to OpenSSL 1.1.1b. This enables the BLAKE2 and SHA-3 algorithms in hashlib.

• Update CA bundle to certifi 2019.3.9.

• Implement pkgutil.iter_modules.

• Build pkg_resources into all apps. Many packages require this but don’t declare a dependency on setuptools.

6.0.0 (2019-03-08)

• Android Gradle plugin version 3.3 is now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin version 3.0 is no longer supported.

• The ABI x86_64 is now supported.

5.1.2 (2019-01-19)

• Add PyObject primitive conversion methods (toBoolean, toInt, etc.).

• Add PyObject container view methods (asList, asMap and asSet).

• If pkg_resources is installed in your app, its “basic resource access” functions will now work.

• Remove directory names when converting exception stack traces from Python to Java. This works around a bug in Google Play which was causing crash reports to be incomplete.

• Change default character encoding from ASCII to UTF-8.

• Make APK build more reproducible.

5.0.0 (2018-11-05)

• The ABI arm64-v8a is now supported.

• [BACKWARD INCOMPATIBLE] Each Chaquopy version will now include only one Python version, so the version setting is no longer required. Simply remove it to use the current version, 3.6.5.

  • Python 2 is no longer included. However, for existing Python 2 users, Chaquopy 4.x will continue to be maintained until the end of 2019 (#39).

• [BACKWARD INCOMPATIBLE] buildPython must now be at least Python 3.4.

• [BACKWARD INCOMPATIBLE] minSdkVersion must now be at least API level 16. This still covers 99% of active devices.

• Runtime components are now distributed as separate Maven artifacts. This fixes various intermittent build errors involving chaquopy_java.jar (#62).

• If pkg_resources is installed in your app, it will now detect all pip-installed packages.

4.0.0 (2018-08-22)

• Android Gradle plugin version 3.2 is now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin version 2.3 is no longer supported.

• Add resource module.

• Remove broken select.kevent/select.kqueue API. This affected PyZMQ, which should now work (Crystax issue #1433).

• Set HOME environment variable if the system hasn’t already done so, so os.path.expanduser can return a usable location.

• Implement importlib.abc.InspectLoader.get_code: this allows runpy.run_module to be used.

3.3.2 (2018-08-01)

• Fix pip issues involving packages with optional native components (e.g. websockets).

• Work around inability of Android dynamic linker on API 22 and older to load multiple modules with the same basename (details here).

• Fix ctypes.pythonapi and sys.abiflags, and provide partial implementation of sysconfig.get_config_vars.

• Fix native crash in lrintf / feholdexcept / fegetenv (Crystax issue #1369).

• Fix pkgutil.get_data when used with extractPackages, and improve extractPackages performance.

3.3.0 (2018-06-20)

• Add fast conversions between Python bytes/bytearray and Java byte[] (#41).

• Make pip evaluate environment markers (PEP 508) and data-requires-python attributes (PEP 503) against the target platform rather than the build platform.

• Make pip only prioritize native wheels (not pure-Python wheels) over sdists of a newer version.

• Fix pip issues when multiple packages provide the same directory or filename.

• Improve pip error messages when packages attempt to build native code.

3.2.0 (2018-06-06)

• Add Python.getPlatform and AndroidPlatform.getApplication.

• Make sure __spec__ is set on modules which are loaded by direct calls to the loader, or via imp.

• Fix hashlib OpenSSL integration.

• Fix pip --no-binary option.

• Improve up-to-date checks on Gradle tasks.

3.1.0 (2018-05-30)

• Add support for installing pure-Python sdists. This means that all pure-Python packages on PyPI should now work with Chaquopy, whether they have wheels available or not. If you have any difficulty installing a package, please report it at our issue tracker.

  • Because of this change, the Python major version of buildPython is now required to be the same as that of the app itself when using pip, and the default value of buildPython has been changed accordingly.

• Fix imp.find_module and imp.load_module.

• Implement implicit namespace packages on Python 3 (PEP 420).

• Add partial support for .pth files. Only the execution of lines starting with import is currently implemented: all other lines are ignored.

• Add message explaining how to show full pip output in Android Studio 3.1’s new Build window.

• Fix “registering invalid inputs” warning in Android Studio 3.1.

3.0.0 (2018-05-15)

• Android Gradle plugin version 3.1 is now supported.

• [BACKWARD INCOMPATIBLE] Android Gradle plugin version 2.2 is no longer supported. If you’re still using Android Studio 2.2, then we highly recommend that you upgrade to the current version 3.1. Our testing shows that it builds apps more than twice as fast, whether you’re using Chaquopy or not.

• Add Python versions 2.7.15 and 3.6.5, and fix a few lesser-used standard library modules.

• Update to pip version 10.0.1.

• Build reliability fixes, including one for over-strict metadata parsing.

• Further build speed improvements.

• Improve app startup speed where a requirement is reinstalled at the same version as before.

2.1.0 (2018-04-26)

• Add ability to load native library dependencies. This is required by the newly-added packages for PyZMQ and SciPy.

• Improve pip install performance.

2.0.1 (2018-03-22)

• Fix a crash reported on various devices, especially Samsung Galaxy J series phones.

• Fix NumPy dependency on libc functions not present in API level 17 and earlier.

• Remove debugging information from native modules. All native packages benefit from this, but especially NumPy, which is now smaller by 4 MB per ABI.

• Disable upgrade notification from bundled copy of pip.

2.0.0 (2018-03-15)

• General performance improvements: the Python unit tests now run about 25% faster.

• [BACKWARD INCOMPATIBLE] The import hook now only looks up names in Java if they failed to import from Python. This significantly speeds up import of large Python packages. However, it means that importing a name which exists in both languages is no longer reported as an error: instead, the value from Python will be returned.

• Fix a crash on API level 15 caused by the license notification.

1.4.0 (2018-03-05)

• The Python standard library is now loaded from compiled .pyc files by default (see documentation). As a result, startup of a minimal app is now 20-30% faster with Python 2, and 50-60% faster with Python 3. (Python 3 startup is still slower than Python 2, but only by 15-20%.)

• sys.stdin now returns EOF rather than blocking. If you want to run some code which takes interactive text input, you may find the console app template useful.

• The write method of sys.stdout and sys.stderr now returns the character count.

• Very long lines written to sys.stdout and sys.stderr are now split into slightly smaller fragments, to allow for the shorter Logcat message length limit in recent versions of Android.

• Fix a multi-threading deadlock.

• Apps built with an unlicensed copy of the SDK are now limited to a run-time of 5 minutes.

1.3.1 (2018-01-26)

• Static proxy generator now handles non-ASCII source files correctly (#27).

1.3.0 (2018-01-15)

• The following things now return reasonable values: sys.argv, sys.executable, and platform.platform().

• The following modules now work correctly: sqlite3, ssl (#23), and tempfile. (Requires Python version to be 2.7.14 or 3.6.3.)

• sys.stdout and sys.stderr are now directed to the Android Logcat.

• Add extractPackages, and use it by default for certifi.

1.2.0 (2018-01-07)

• Python source directory locations can now be configured in the sourceSets block, just like Java.

• getClass, when called on a Java object, now returns the Java object class rather than the proxy object class.

• Generated static_proxy Java files no longer produce build warnings.

• Ensure pip is re-run if local requirements or wheel file changes.

• Add Python 2.7.14.

• Include distutils and doctest modules (#20). (Requires Python version to be 2.7.14 or 3.6.3.)

1.1.0 (2017-12-22)

• Add Python 3.6 runtime (#1).

• buildPython can now be Python 2.7 or 3.3+ (#2).

• Support configuration in product flavors (#6).

• Improve startup performance.

0.6.1 (2017-12-11)

• Apps can now use certain native packages, including NumPy (#14), as well as some pure-Python packages which aren’t available from PyPI in wheel format. To support this, the build.gradle syntax for calling pip install has been changed: please see the documentation.

• Zero-initialized Java arrays can now be created in Python, by passing an integer to the array constructor rather than a sequence.

0.5.0 (2017-11-04)

• Support Android Gradle plugin versions 2.2 (#9) and 3.0 (#3).

• Increase minimum API level to 15. This still covers 99% of active devices.

• Fix array store type-checking on old Android versions.

• Add java.detach, and fix several multi-threading issues.

0.4.5 (2017-10-26)

• Remove dependency on six (#13).

0.4.4 (2017-10-24)

• Fix implicit relative imports (#12).

0.4.3 (2017-09-21)

• Improve startup performance.

0.4.0 (2017-09-11)

• Add dynamic_proxy and static_proxy.

0.3.0 (2017-07-28)

• Reflect Java class hierarchy in Python.

• Represent Java exceptions with their actual classes.

• Support Python unbound method syntax when calling Java methods, i.e. ClassName.method(instance, args).

• Release GIL when calling Java constructors.

0.2.0 (2017-07-04)

• Add import hook.

• Allow nested classes to be accessed as attributes.

• Improve performance.

0.1.0 (2017-06-24)

• First public release.