SingletonInjector

This simple library will instanciate singletons and inject dependencies depending on whether the parameters passed to inject where previosly marked for singleton

Example

1. There are two classes Car and Brand, the second one is passed the first one as a parameter. If we mark their definitions as @injector, we will see that the classes will still be instanciated as normal classes, but they will be injected with the singleton instanciated class.

from singleton_injector import injector


@injector
class Car:
    def __init__(self):
        print("Instantiating Car class on definition")

# After defining this class marked with @injector, by itself
# should instantiate it's singleton object


@injector
class Brand:
    def __init__(self, car: Car, car2: Car):
        print("Injected Car parameters are the same: %s" % (car is car2))

The output for the above code should be

Instantiating Car class on definition
Injected Car parameters are the same: True

Cheers 👍