Hello, Pycopy is a minimalist, lightweight, resource-efficient implementation of Python(-like) language. Pycopy to CPython is a similar thing as Scheme to Common Lisp. Executable sizes of 300-400KB, instant startup, no need to carry around large monolithic library consisting largely of legacy modules - some but not all of Pycopy's features. Project page: https://github.com/pfalcon/pycopy Now has website too: https://pycopy.github.io/ The 3.4.0 release implements initial version of "strict execution mode" support, which is roughly a way to enforce constantness at the runtime, the complete proposal was posted to the python-ideas mailing list: https://mail.python.org/archives/list/python-ideas@python.org/thread/KGN4Q2E... Pycopy's standard library, pycopy-lib https://github.com/pfalcon/pycopy-lib , also sees continued development, in particular the "re" module compatibility with CPython was largely improved. Prebuilt binaries of this release are available at https://github.com/pfalcon/pycopy/releases/tag/v3.4.0 More details about Pycopy ------------------------- Pycopy strives to define a core language features suitable to easily develop efficient software, while allow for extensibility to a wider (and much more bloaty and less efficient) set of features for compatibility with existing software. Pycopy doesn't come with bulky hazardous lead-acid batteries. Instead, a set of a few core modules are included builtin: inspired, being a noticeable subset, and a little bit of extension, of the corresponding CPython modules. Also, clearly namespaced, to still allow room to implement fully compatible CPython modules. These new modules aren't intended to be an adhoc thing, just an alternative API with a constraint of minimality. Implementation of that API also exists for CPython (WIP), allowing Pycopy -> CPython forward compatibility. The rest is handled outside the core language, via a separate project, pycopy-lib: https://github.com/pfalcon/pycopy-lib , which strives to port CPython stdlib to Pycopy, while, where needed, provide more lightweight module variants and extensions. Pycopy is a full-stack project, with ecosystem including a web micro-framework, pure-Python Python parser, FFMPEG bindings, SDL bindings, LLVM bindings, etc.: https://github.com/topics/pycopy -- Best regards, Paul mailto:pmiscml@gmail.com