(not serious)

dependency_injection.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Python dependency injection experiment!!
# Provides a DependencyScope object which lets you declare
# dependencies and inject them in functions à la AngularJS

class DependencyScope:
    def __init__(self):
        self.dependencies = {}
        
    def register(self, name=''):
        def register_inner(func):
            self.dependencies[name] = func
            return func
        return register_inner

    def inject(self, deps=[]):
        def inject_inner(func):
            def f(*args, **kwargs):
                for d in deps:
                    # Try to get registered dependency
                    try:
                        dep = self.dependencies[d]
                    except KeyError:
                        # Otherwise is it a Python pkg?
                        dep = __import__(d)
                    kwargs[d] = dep
                return func(*args, **kwargs)
            return f
        return inject_inner

scope = DependencyScope()


# This uses the 'requests' library -
# make sure you have it installed
@scope.register(name='print_content_dep')
@scope.inject(deps=['requests'])
def print_content(url, requests=None):
    r = requests.get(url)
    print(r.content)


@scope.inject(deps=['print_content_dep'])
def test(print_content_dep=None):
    print_content_dep('https://www.theguardian.com/uk')

print(scope.dependencies)

test()