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Yet another Dependency Injection (IOC) component for Python

Project description

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Another Dependency Injection library for Python.

This package has following three guidelines:

  • any class configured by Container mechanism should not be modified in any way
  • there is no need for external services definition files for Container
  • no Container compiling and service tagging - we have introspection and dynamic language for this task

And so this package provides:

  • no xml configuration
  • no annotations (more cons than pros)
  • no changes to services code

Official repositories

For forking and other funnies.

BitBucket: https://bitbucket.org/glorpen/glorpen-di

GitHub: https://github.com/glorpen/glorpen-di

Supported design patterns

Service instance can be created by:

  • factory service
  • calling class object with arguments

Instance options can be altered by:

  • constructor arguments
  • setters
  • calling methods
  • using configurator service

Each service has defined scope, service cannot request other service from narrower scope.

Injecting services and parameters

from glorpen.di import Container

class MyParamService(object):
    pass

class MyService(object):
    def __init__(self, obj, text, value):
        super(MyService, self).__init__()
        print("service instance: %s" % obj)
        print("container parameter: %s" % text)
        print("provided value: %s" % value)

c = Container()

c.add_service(MyParamService)
c.add_parameter('my-param', "value from container")
c.add_service(MyService).kwargs(obj__svc=MyParamService, text__param="my-param", value="defined value")

c.get(MyService)

Running snippet will print:

service instance: <__main__.MyParamService object at 0x7f2fef6e9828>
container parameter: value from container
provided value: defined value

See https://glorpen-di.readthedocs.io/en/latest/ for code examples and more documentation.

Project details


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