A Metaversal Python Framework

A metaverse project for building a version of Python that can be embedded into a macOS, visionOS, iOS, tvOS or watchOS project.

This branch builds a packaged version of Python 3.11.6. Other Python versions are available by cloning other branches of the main repository:

• TBD.

It works by downloading, patching, and building a fat binary of Python and selected pre-requisites, and packaging them as static libraries that can be incorporated into an XCode project. The binary modules in the Python standard library are statically compiled, but are distributed as objects that can be dynamically loaded at runtime.

It exposes almost all the modules in the Python standard library except for:

• dbm.gnu
• tkinter
• readline
• nis (Deprecated by PEP594)
• ossaudiodev (Deprecated by PEP594)
• spwd (Deprecated by PEP594)

The following standard library modules are available on macOS, but not the other Apple platforms:

• curses
• grp
• multiprocessing
• posixshmem
• posixsubprocess
• syslog

The binaries support x86_64 and arm64 for macOS; arm64 for visionOS, iOS and tvOS devices; and arm64_32 for watchOS. It also supports device simulators on both x86_64 and M1 hardware. This should enable the code to run on:

• macOS 12 (Monterey) or later, on:
  • MacBook (including MacBooks using Apple Silicon)
  • iMac (including iMacs using Apple Silicon)
  • Mac Mini (including Apple Silicon Mac minis)
  • Mac Studio (all models)
  • Mac Pro (all models)
• visionOS 1.0 or later, on:
  • Vision Pro (all models)
• iOS 12.0 or later, on:
  • iPhone (6s or later)
  • iPad (5th gen or later)
  • iPad Air (all models)
  • iPad Mini (2 or later)
  • iPad Pro (all models)
  • iPod Touch (7th gen or later)
• tvOS 9.0 or later, on:
  • Apple TV (4th gen or later)
• watchOS 4.0 or later, on:
  • Apple Watch (4th gen or later)

Quickstart

Alternatively, to build the frameworks on your own, download/clone this repository, and then in the root directory, and run:

• make (or make all) to build everything.
• make macOS to build everything for macOS.
• make xrOS to build everything for visionOS.
• make iOS to build everything for iOS.
• make tvOS to build everything for tvOS.
• make watchOS to build everything for watchOS.

This should:

1. Download the original source packages
2. Patch them as required for compatibility with the selected OS
3. Build the packages as Xcode-compatible XCFrameworks.

The resulting support packages will be packaged as a .tar.gz file in the dist folder.

Each support package contains:

• VERSIONS, a text file describing the specific versions of code used to build the support package;
• bin, a folder containing shell aliases for the compilers that are needed to build packages. This is required because Xcode uses the xcrun alias to dynamically generate the name of binaries, but a lot of C tooling expects that CC will not contain spaces.
• platform-site, a folder that contains site customization scripts that can be used to make your local Python install look like it is an on-device install for each of the underlying target architectures supported by the platform. This is needed because when you run pip you'll be on a macOS machine with a specific architecture; if pip tries to install a binary package, it will install a macOS binary wheel (which won't work on xrOS/iOS/tvOS/watchOS). However, if you add the platform-site folder to your PYTHONPATH when invoking pip, the site customization will make your Python install return platform and sysconfig responses consistent with on-device behavior, which will cause pip to install platform-appropriate packages.
• Python.xcframework, a multi-architecture build of the Python runtime library
• python-stdlib, the code and binary modules comprising the Python standard library. On xrOS, iOS, tvOS and watchOS, there are 2 copies of every binary module - one for physical devices, and one for the simulator. The simulator binaries are "fat", containing code for both x86_64 and arm64.

Building binary wheels

When building binary wheels, you may need to use the libraries built by this project as inputs (e.g., the cffi module uses libffi). To support this, this project is able to package these dependencies as "wheels" that can be added to the dist directory.

To build these wheels, run:

• make wheels to make all wheels for all mobile platforms
• make wheels-xrOS to build all the visionOS wheels
• make wheels-iOS to build all the iOS wheels
• make wheels-tvOS to build all the tvOS wheels
• make wheels-watchOS to build all the watchOS wheels