containers
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
supported container classes
- dict
- list
- multimap
example
(read test_containers.py for more examples).
import containers
@containers.container_class
class C:
def __init__(self, x):
self.x = x
@containers.container_method(list)
def sum(container):
return sum(item.x for item in container)
@containers.container_key
def key(self):
return self.x
c_list = C.container(list)
c_list.append(C(1))
c_list.append(C(2))
# items of incompatible type are rejected
with pytest.raises(TypeError):
c_list.append(3)
# container_method methods are available on the list
assert c_list.sum() == 3
# automatic dictionary keys
c_dict = C.container(dict)
c_dict.add_value(C('k'))
assert c_dict['k'].x == 'k'
assert C('k').key() == 'k'compatibility
Tested on 2.7 and 3.4.
installation
pip install containers
# or for git master branch:
pip install git+https://github.com/abe-winter/containers.git#subdirectory=containers
roadmap
- more container types (trees)
- storage optimizations (unboxing on cython)
