Fang: Pythonic dependency injection
summary
Fang is a ~300-line Python DI library that actually runs: about 300 lines, with resources identified by names (strings) and implementations registered as no-arg provider callables. Dependencies attach via a decorator and get injected by unpacking into functions or constructors; providers are registered at program entry so import-time singletons stay replaceable. Tests must clear and re-register providers between cases. Planned features include namespaces, stdlib/third‑party adapters, and publishing to PyPI.
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