Singleton Pattern Python Packages

oncequinox

micro-library for making Equinox singletons

nsingleton

Just another singleton pattern implementation. Thread-safe, with type casting.

smalldi

Tiny, zero-dependency DI for Python. Decorators register singletons and interfaces, Provide[T] type hints inject them, overrides swap implementations, and scoped contexts give every test fresh instances. Thread-safe and tested on free-threaded CPython 3.14t/3.15t.

monostate

Dependency-free python package, providing monostate owner base class through implementation of the borg pattern

mypubsub

A Python library implementing the publish-subscribe pattern.

design-pytterns

Python 3 Design Patterns

unredoable

Dependency-free python package, providing monostate owner base class through implementation of the borg pattern

pydi-framework

Python Dependency Injection Framework