containers 0.0.3

automatic typed collections in python using decorators

This is a python library for typed containers – it makes it safer & easier to work with lists & dicts of items of the same type by providing:

• type checks

• container methods

• automatic dictionary keys

Example:

import containers

@containers.container_class
class Item:
    def __init__(self, x):
        self.x = x

    @containers.container_method()
    def sum(container):
        return sum(item.x for item in container)

    @containers.container_key
    def key(self):
        return self.x

list_ = Item.container(list)
list_.append(Item(1))
list_.append(Item(2))

# items of incompatible type are rejected
with pytest.raises(TypeError):
    list_.append(3)

# container_method methods are available on the list
assert list_.sum() == 3