Update to Python version 3.8.16 and OpenSSL version 1.1.1s. This fixes the Google Play warning “Your app uses a defective version of the OpenSSL library”. (#727)
Update CA bundle to certifi 2022.12.7. (#747)
pythonexecutable as a final fallback when searching for buildPython. (#752)
extractPackagessetting, for code that requires its modules to exist as separate .py files. (#754)
Android Gradle plugin version 7.4 is now supported. (#756)
Android Gradle plugin version 8.0 is now supported, though projects which use
minifyEnabled truewill require a workaround. (#842)
Update to pip version 20.1.
Enable PEP 517 builds in pip. (#715)
Show correct error message when buildPython autodetection fails. (#733)
Fix error when calling
entry_pointswith an unreadable directory on
Fix “Could not find an activated virtualenv” error when
PIP_REQUIRE_VIRTUALENVenvironment variable is set. (#777)
Android Gradle plugin version 7.3 is now supported (#663).
minSdkVersionmust now be at least API level 21. This still covers 98% of active devices.
Python versions 3.9, 3.10 and 3.11 are now supported (#661).
Detect changes to files or directories listed in requirements files (#660).
Projects are no longer required to have a local.properties file, as long as the
ANDROID_SDK_ROOTenvironment variable is set (#672).
Update to pkg_resources version 56.2.0.
Update to SQLite version 3.39.2.
Update Python 3.9 and later to OpenSSL version 3.0.5.
First open-source release. Apart from removing the license restrictions, this is identical to version 12.0.0.
Android Gradle plugin version 7.2 is now supported (#613).
[BACKWARD INCOMPATIBLE] Android Gradle plugin version 4.0 is no longer supported.
Update to Python version 3.8.13 (see its changelog for details).
Update CA bundle to certifi 2021.10.8.
buildscriptconfiguration to be in a subproject (#615).
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.
pluginssyntax is now supported.
Java arrays now support the
copy.copyfunction in Python.
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
versionsetting 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.
Java arrays now support the
countmethods in Python. In order to support code with
hasattrchecks, they also now implement the methods
__reversed__, rather than relying on the fallback to
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_locationnow works for paths loaded from the APK.
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).
buildPythonpath can now contain spaces.
Java API is now annotated with
Java arrays now support the
copymethod in Python.
Fix bug when using
castto call a functional interface which extends another functional interface.
Update CA bundle to certifi 2020.12.5.
jsonmodule performance improvements.
Java API performance improvements.
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 arrays can now be accessed from Python using negative indices and slice syntax.
Fix conversion of non-contiguous NumPy arrays to Java arrays.
zipimportimplement the new loader API. This affected the package
bdist_wheelfails for an unknown reason, fall back on
setup.py install. This affected the packages
minifyEnabledis in use (#261).
Fix “invalid constraint” error affecting the packages
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
Fix “This platform lacks a functioning sem_open implementation” error when using
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
NoClassDefFoundErrorwhen using Python to access certain
Fix conversion of Java
bytearray to Python
Improve startup speed by deferring
pkg_resourcesinitialization until the module is first imported.
Update CA bundle to certifi 2020.4.5.1.
Most native packages have been upgraded to a more recent version. If you’ve used specific version numbers in a
requirements.txtfile, 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
apiconfiguration 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
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.
Android Gradle plugin version 3.5 is now supported.
Pre-compile Python code to
.pycformat by default, so it doesn’t have to be compiled on the device. This significantly improves app startup speed and storage usage.
extractPackagessetting, 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
Fix “has no DT_SONAME” warning (#112).
Android Gradle plugin version 3.4 is now supported.
Update to OpenSSL 1.1.1b. This enables the BLAKE2 and SHA-3 algorithms in
Update CA bundle to certifi 2019.3.9.
pkg_resourcesinto all apps. Many packages require this but don’t declare a dependency on setuptools.
Android Gradle plugin version 3.3 is now supported.
[BACKWARD INCOMPATIBLE] Android Gradle plugin version 3.0 is no longer supported.
x86_64is now supported.
PyObjectprimitive conversion methods (
PyObjectcontainer view methods (
pkg_resourcesis 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.
arm64-v8ais now supported.
[BACKWARD INCOMPATIBLE] Each Chaquopy version will now include only one Python version, so the
versionsetting 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.
minSdkVersionmust 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
pkg_resourcesis installed in your app, it will now detect all pip-installed packages.
Android Gradle plugin version 3.2 is now supported.
[BACKWARD INCOMPATIBLE] Android Gradle plugin version 2.3 is no longer supported.
HOMEenvironment variable if the system hasn’t already done so, so
os.path.expandusercan return a usable location.
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 native crash in
fegetenv(Crystax issue #1369).
pkgutil.get_datawhen used with
extractPackages, and improve
Add fast conversions between Python
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.
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
buildPythonhas been changed accordingly.
Implement implicit namespace packages on Python 3 (PEP 420).
Add partial support for
.pth files. Only the execution of lines starting with
importis 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.
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.
Add ability to load native library dependencies. This is required by the newly-added packages for PyZMQ and SciPy.
Improve pip install performance.
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.
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.
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.stdinnow 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.
sys.stderrnow returns the character count.
Very long lines written to
sys.stderrare 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.
Static proxy generator now handles non-ASCII source files correctly (#27).
The following things now return reasonable values:
The following modules now work correctly:
tempfile. (Requires Python version to be 2.7.14 or 3.6.3.)
sys.stderrare now directed to the Android Logcat.
extractPackages, and use it by default for certifi.
Python source directory locations can now be configured in the
sourceSetsblock, just like Java.
getClass, when called on a Java object, now returns the Java object class rather than the proxy object class.
static_proxyJava files no longer produce build warnings.
Ensure pip is re-run if local requirements or wheel file changes.
Add Python 2.7.14.
doctestmodules (#20). (Requires Python version to be 2.7.14 or 3.6.3.)
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.gradlesyntax for calling
pip installhas 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.
Remove dependency on
Fix implicit relative imports (#12).
Improve startup performance.
Add dynamic_proxy and static_proxy.
Reflect Java class hierarchy in Python.
Represent Java exceptions with their actual classes.
Support Python unbound method syntax when calling Java methods, i.e.
Release GIL when calling Java constructors.
Add import hook.
Allow nested classes to be accessed as attributes.
First public release.