# rInject
A flexible (annotations or keys) but simple dependency injection library for Python 3.
## Installation
```pip install rinject```
## Usage
```python
from rinject import Injector
from datetime import datetime
injector = Injector()
class A:
def __init__(self, greeting: str):
self.greeting = greeting
def __call__(self, name: str):
print(f"{self.greeting} {name}")
class B:
def __init__(self, a: A, name: str):
self.a = a
self.name = name
def __call__(self):
self.a(self.name)
if __name__ == "__main__":
injector.register_value("greeting", "Hello")
injector.register_instance(A, A)
injector.register_instance(B, B)
injector.register_factory("name", lambda: "Steve@" + datetime.utcnow().isoformat())
b = injector.resolve(B)
b() # outputs => Hello Steve
b2 = injector.resolve(B)
assert b is b2
```
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