Download Python Download Free – 3.13.0 Beta 4

Python is an interpreted, interactive, object-oriented programming language. It contains modules, exceptions, dynamic typing, very high-level dynamic data types, and classes. It supports several programming paradigms beyond object-oriented programming, such as procedural and functional programming.

Python combines remarkable power with very clear syntax. It interfaces to many system calls and libraries, as well as to various windowing systems, and can be extended in C or C++. It is also usable as an extension language for applications that need a programmable interface. Finally, Python is portable: it runs on many Unix variants, including Linux and macOS, and on Windows.

Characteristics

• Very clear, readable syntax
• Strong introspection skills
• Intuitive object orientation
• Natural expression of procedural code
• Full modularity, supports hierarchical packages
• Exception-based error handling
• Very high-level dynamic data types
• Extensive standard libraries and third-party modules for virtually any task
• Extensions and modules are easily written in C, C++ (or Java for Jython, or .NET language for IronPython)
• Can be built into applications as a scripting interface

Python is powerful… and fast

Fans of Python use the phrase “batteries included” to describe the standard library, which covers everything from asynchronous processing to zip files. Language itself is a flexible powerhouse that can handle virtually any problem domain. Build your own web server in three lines of code. Build flexible data-driven code using Python’s powerful and dynamic introspection capabilities and advanced language features such as metaclasses, duck typing, and decorators.

Python lets you write the code you need, quickly. And thanks to a highly optimized byte compiler and support libraries, Python code runs more than fast enough for most applications. The traditional implementation of CPython uses a bytecode virtual machine; PyPy supports just-in-time (JIT) compilation to machine code. Jython and IronPython (see below) also support JIT compilation on their respective virtual machine implementations.

Python plays well with others

Python can be integrated with COM, .NET and CORBA objects.

For Java libraries, use Jython, an implementation of Python for the Java Virtual Machine.

For .NET, try IronPython , Microsoft’s new implementation of Python for .NET, or Python for .NET.

Python is also supported for the Internet Communications Engine (ICE) and many other integration technologies.

If you find something that Python can’t do, or if you need the performance benefit of low-level code, you can write extension modules in C or C++, or package existing code with SWIG or Boost.Python. Wrapped modules appear to your program exactly as native Python code. It’s language integration made easy. You can also go the other way and embed Python in your own application, giving your users a language they will enjoy using.

Python runs everywhere

Python is available for all major operating systems: Windows, Linux/Unix, OS/2, Mac, Amiga, among others. There are even versions that run on .NET and the Java Virtual Machine. You’ll be happy to know that the same source code will run unchanged across all implementations.

Is your favorite system not listed here? It can still support Python if there is a C compiler for it. Ask around at news:comp.lang.python – or just try compiling Python yourself.

Python is friendly… and easy to learn

The Python newsgroup is known as one of the friendliest around. The avid developer and user community maintains a wiki, hosts international and local conferences, runs development sprints, and contributes to online code repositories.

Python also comes with complete documentation, both integrated into the language and as separate web pages. Online tutorials are aimed at both the experienced programmer and the newcomer. All are designed to get you productive quickly. The availability of premium books completes the learning package.

Python is open source

The Python implementation is under an open source license which makes it freely usable and redistributable, even for commercial use. The Python license is administered by the Python Software Foundation.

Take a look at application domains where Python is used, or try the current download yourself.

What is new

Python 3.13 is still under development. This release, 3.13.0b4, is the final beta preview of 3.13.

Beta previews are intended to give the community the opportunity to test new features and bug fixes and prepare their projects to support the new feature release.

We strongly encourage maintainers of third-party Python projects to test with 3.13 during the beta phase and report any issues found to the Python bug tracker as soon as possible. While the release is planned to be functional and entering the beta phase, it is possible that features may be changed or, in rare cases, deleted until the start of the release candidate phase (Tuesday 2024-07-30). Our goal is to have no ABI changes after this latest beta, and as few code changes as possible after 3.13.0rc1, the first release candidate. To achieve that, it will be extremely important to get as much exposure to 3.13 as possible during the beta phase.

Please note that this is a preview release and its use is not recommended for production environments.

Major new features in the 3.13 series, compared to 3.12

Some of the new major new features and changes in Python 3.13 are:

New features

• A new and improved interactive interpreter, based on PyPy’s, with multi-line editing and color support, as well as colored exception traces.
• An experimental free-threaded build mode, which disables the Global Interpreter Lock, allowing more threads to run concurrently. The build mode is also available as an experimental feature in the Windows and macOS installers.
• A preliminary, experimental JIT, which provides the basis for significant performance improvements.
• The locals() builtin function (and its C equivalent) now has well-defined semantics when mutating the returned mapping, allowing debuggers to operate more consistently.
• The (cyclical) garbage collector is now incremental, which should mean shorter collection pauses in programs with many objects.
• A modified version of mimalloc is now included, optional but enabled by default if supported by the platform, and required for the free-threaded build mode.
• Docstrings now have their leading indentation removed, reducing memory usage and the size of .pyc files. (Most tools that handle docstrings already remove leading indents.)
• The dbm module has a new dbm.sqlite3 backend that is used by default when creating new files.
• Minimum supported macOS version changed from 10.9 to 10.13 (High Sierra). Older macOS versions will not be supported going forward.
• WASI is now a Tier 2 supported platform. Emscripten is no longer an officially supported platform (but Pyodide continues to support Emscripten).

Writing

• Support for type defaults in type parameters.
• A new type of narrowing comment, typing.TypeIs.