This is a preview release for 19.2 and we recommend testing it for all users.

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in 19.1.1:

• Updated to the latest GraalVM version

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in 19.1.0:

• Add java.add_to_classpath API to dynamically extend the host class path
• Allow write access to main module bindings for embedder
• Swap arguments for polyglot.export_value to use the more natural (name, value) order and deprecate the previous argument order.
• Update Python standard library files to Python 3.7.3
• Improve performance of exceptions that do not escape
• Fix str(None) to print "None" instead of an empty string
• Fix error messages on polyglot objects to not leak implementation class names of those objects
• Fix erroneously frozen package paths in pre-initialized python modules
• Fix caching of core sources in a native image with a preinitialized context for pre-built images and libpolyglot fast startup
• Implement pwd.getpwuid
• Implement os.exec, os.execv, and os.execl
• Add some missing C API headers needed for tensorflow compilation

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in 19.0.2:

• Updated to the latest GraalVM version

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in 19.0.0:

• Fix an issue preventing use of encodings in the installable binary
• Fix return value of process when os.exit is called with a boolean, enabling running unittests with the correct return result
• Fix interpretation of foreign objects to prefer interpreting them as integer over double
• Fix performance regression when repeatedly creating a new function in a loop

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

RC16 was focused on cleanup and adding tests, so there are no user facing changes.

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in RC15:

• Implement PEP 487 __init_subclass__
• Implement PEP 560 __class_getitem__ and __mro_entries__
• Migrate to Truffle libraries for interop
• Support the buffer protocol for mmap
• Support importing java classes using normal Python import syntax
• Improve performance of literal dictionary creation when the first but not all keys are strings
• Improve performance of getting the length of a string
• Improve performance of accessing defaults, keyword-defaults, and code of a function
• Fix getting file separator from the Truffle filesystem rather than the operating system
• Fix constructing and calling methods with non-function callables
• Fix execution of subprocesses with non-default python homes on JVM

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in RC14:

• Mark a subset of the Graal Python launcher options as "stable". All other options are subject to change and need to be unlocked explicitly on the commandline.
• Automatically install pip when creating a venv. The socket and ssl libraries are still not functional, so pip can only install from local sources or wheels.
• Update the standard library to Python 3.7.0 from 3.6.5.
• Support the -I flag to ignore the user environment and not add the working directory to sys.path
• Fix an error preventing usage of the memtracer tool. If an object raised an exception in it's __repr__ method, it would abort the execution.
• Fix issues around not being able to modify function defaults, keyword defaults, or re-defining a function with a different closure.
• Fix continuation prompt in the interactive Python shell when an incomplete statement was typed. Before it raised and ignored a SyntaxError.
• Fix frame restarting of Python functions in the Chrome debugger. Before, functions with closures would have their cells accidentally cleared.

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in RC13:

• Support marshal.dumps and marshal.loads for code objects and some other built-in objects
• Fix installation of NumPy in a venv
• Initial support for module mmap
• Support debugging with workspace files in the Chrome debugger
• Support the PEP 553 breakpoint() message
• Support running weak reference callbacks and signals on the main thread

This is a Python 3 implementation on top of GraalVM. Currently, it is in the early stages of development and as such, it is not ready for any serious applications beyond simple use cases and scripting. The main focus of development right now is to get NumPy, SciPy, and related libraries working.

The Python language components can be installed in GraalVM using the gu utility.

More information is available on the GraalVM website: http:https://www.graalvm.org/docs/reference-manual/languages/python/

Changes in RC12:

• Support the __class__ variable in the class scope
• Support module-level docstrings
• Initial support for the venv standard-library tool
• Initial support for the built-in _bz2 module
• Initial support for the pandas package
• Initial support for OSError subclasses based on the errno of the exception
• Fix bytearray inplace add to return the same object
• Fix access to standard Python methods (__repr__, __str__, __len__ and the like) for foreign objects