IOCynergy
Python module for IOC container using dependency injection (uses python 3+ type hints, supported until Python3.7)
Easy way to initialize your services
from cynergy import container
class TestClass:
pass
class ParentClass:
def __init__(self, test_class: TestClass):
self.test_class = test_class
instance = container.get(ParentClass) # Returns TestClass initialized as singleton
print(type(instance)) # ParentClass
print(type(instance.test_class)) # TestClass
Access to your configuration from any service
from cynergy import container
from cynergy.config import Config, MemoryConfig
from cynergy.attributes import arguments
@arguments(db=Config('db_name'),host=Config('hostname'))
class DbConnector:
def __init__(self, db: str, host: str):
self.db = db
self.host = host
container.initialize(MemoryConfig({
"db_name": "LocalDbName",
"hostname": "localhost"
}))
instance = container.get(DbConnector)
print(instance.db) # LocalDbName
print(instance.host) # localhost
** You can implement your own configuration provider (for exmaple you can create DbConfigProvider which provides your settings from the db)
Manually register special types
from cynergy import container
class Original:
pass
class Other:
pass
container.register_class(Original, Other)
instance = container.get(Original)
print(type(instance)) # Other
Register collection of services
from typing import List
from cynergy import container
class HandlerBase:
pass
class SomeHandler1(HandlerBase):
pass
class SomeHandler2(HandlerBase):
pass
class SomeService:
def __init__(self, handlers: List[HandlerBase]):
self.handlers = handlers
container.register_many(HandlerBase, [SomeHandler1, SomeHandler2])
instance = container.get(SomeService)
print(type(instance.handlers)) # list
print(type(instance.handlers[0])) # SomeHandler1
print(type(instance.handlers[1])) # SomeHandler2
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