Accessing the container is as simple as from ioccontainer import c. You can now use c to set up service providers and access services.
from ioccontainer import c
class MyService:
def __init__(self, val: int=1):
self.val = val
def provide_my_service():
return MyService()
c.provide(MyService, provide_my_service)
You can also use the @provider decorator.
from ioccontainer import c, provider
@provider(MyService)
def provide_my_service():
return MyService()
from ioccontainer import c
my_service = c.get(MyService)
You can also use the @inject decorator. You can specify which service to inject into a variable as an argument, or use annotations.
from ioccontainer import inject
@inject(my_service=MyService)
def get_val_from_specified_service(my_service):
return my_service.val
@inject('my_service')
def get_val_from_annotated_service(my_service: MyService):
return my_service.val
You can specify as many injections as you want inside of the @inject decorator.
from ioccontainer import inject
@inject('db', 'my_service', users=UserRepository)
def do_something(db: DatabaseAdapter, action, my_service: MyService, users):
pass
do_something(action='some_action')
There are different scopes that you can apply to services.
A new instance of the service will be created each time it is resolved. This is the default scope.
from ioccontainer import c, provider, scopes
@provider(MyService, scopes.NO_SCOPE)
def provide_my_service():
return MyService()
first = c.get(MyService)
second = c.get(MyService)
print(first.val) # 1
print(second.val) # 1
first.val = 2
print(first.val) # 2
print(second.val) # 1
The same instance of the service will be created each time it is resolved
from ioccontainer import c, provider, scopes
@provider(MyService, scopes.SINGLETON)
def provide_my_service():
return MyService()
first = c.get(MyService)
second = c.get(MyService)
print(first.val) # 1
print(second.val) # 1
first.val = 2
print(first.val) # 2
print(second.val) # 2
The same instance of the service will be created each time it is resolved within a thread.
from ioccontainer import provider, scopes
@provider(MyService, scopes.THREAD)
def provide_my_service():
return MyService()
pip install -e ".[test]"
tox
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