[Python] DI (Dependency Injection) container Which one should I use?

Python mock can be easily monkey patched. If you use it, you can unit test without a DI container. However, the body accustomed to DI containers wants IoC, so I decided to look for DI containers.

DI container requirements

I want such a DI container.

• From the type hint, it will search for the concrete class and inject it automatically.
• You can choose singleton or generated every time
• You can use the instantiation factory
• Constructor injection or property injection (class is container independent)

Journey to find a DI container

Searching for DI Container on PyPi hits over 10,000. Eh, no way, all this?

152 hits when googled. Still too much!

Let's rely on our predecessors here.

Injector

This is the article that was introduced.

• Dependency Injection Dependency Injection in Python
• DI (Dependency Injection) in Python
• Achieving Crean Architecture with Python 3.7

It becomes a constructor injection. It seems that it meets all the requirements, which may be good.

PInjector

This is the article that was introduced.

• Dependency Injection in Python

It looks like a reimplementation of the above Injector. Is the dependency resolved by the argument name instead of the type hint?

autocontainer

Type hints will resolve the dependency. Whether it's a singleton or not is specified in code, not in the decorator. It's simple and may be necessary and sufficient.

Other

It is a library that does not meet the requirements because it has to be registered in the container by itself or it needs to be set separately.

• di-container
• python-simple-di
• typedi
• lagom
• nanoinject
• dependency-injector