Refactoring (#8)

* Rename Depends to Provide

* Use weakref

* Remove ResolvedDependency

* Rearrange code and add docstrings

* Refactor resource decorator

* More refactoring

* More refactoring

* Duplicated code; I don't know how to rewrite this in a nice way

* Add init_resources

* trying to refactor more [meh]

* Add lock

* Update README.md

README.md

@@ -7,28 +7,31 @@
 
 Simple Dependency Injection for Python
 
-
-## Features
-
-- Add yours!
-
+Experimental dependency injection library for Python. Use it at your own risk.
 
 ## Installation
 
 ```bash
 pip install nanodi
 ```
 
-
 ## Example
 
-Showcase how your project can be used:
-
 ```python
-from nanodi.example import some_function
+from nanodi import inject, Provide
+
+
+def get_redis() -> str:
+    yield "redis"
+    print("closing redis")
+
+
+@inject
+def get_storage_service(redis: str = Provide(get_redis)) -> str:
+    return f"storage_service({redis})"
+
 
-print(some_function(3, 4))
-# => 7
+assert get_storage_service() == "storage_service(redis)"
 ```
 
 ## License

nanodi/__init__.py

@@ -1,3 +1,3 @@
-from nanodi.nanodi import Depends, inject, resource, shutdown_resources
+from nanodi.nanodi import Provide, init_resources, inject, resource, shutdown_resources
 
-__all__ = ["Depends", "inject", "shutdown_resources", "resource"]
+__all__ = ["Provide", "inject", "init_resources", "shutdown_resources", "resource"]