manual dependency injection - maybe done better

# Business and Data Objects
import functools
class Foo:
    def __init__(self,create_bar):
        self.create_bar = create_bar
    def do_stuff(self,times):
        for _ in range(times):
            bar = self.create_bar()
            print(bar)

class Bar:
    def __init__(self,prefix):
        self.prefix = prefix
    def __str__(self):
        return str(self.prefix)+"Hello"

class Prefix:
    def __init__(self,name):
        self.name = name
        self.count = 0
    def __str__(self):
        self.count +=1
        return self.name+" "+str(self.count)+": "

# Wiring up dependencies
def create_bar(prefix):
    return Bar(prefix)


def create_prefix(name):
    return Prefix(name)


def create_foo(name):
    return Foo(functools.partial(create_bar,create_prefix(name)))

# Starting the application
f1 = create_foo("foo1")
f2 = create_foo("foo2")
f1.do_stuff(3)
f2.do_stuff(2)
f1.do_stuff(2)