IterDict 0.1.0

Dict that lazily populates itself with items from the iterator it was constructed with as keys are accessed

IterDicts are almost exactly like regular Python dicts, except that they’re only populated upon demand. This gives them most of the same advantages of generators, such as the ability to operator on very large (or infinite!) datasets. For example:

Accessing keys that aren’t populated yet

>>> d = IterDict((a, a) for a in xrange(1000000000000000))  # 1 quadrillion (US)
>>> d[10]
10

Deleting keys that aren’t populated yet

>>> del d[20]
>>> del d[20]
KeyError: 20