What are the useful collections that are missing in the collections module?
Let's see: - sortedDict, sortedSet (based on a search tree) - frozenDict - bitArray (or bitset) - graph - linkedList (*) (*) linkedList is like deque, it's a linked list of short arrays, but they aren't 100% full. Few more that are less important: - biDict (bidirectional dict, a bijection) - persistentList, persistentDict - intervalDict - Trie - Dawg - Rope - Fibonacci heap - Bloom filter - Union-Find With those I think many things are covered :-) Regarding the standard library of Python 3, it's easy enough to create for mistake a module and have it collide with an equally named module of the std lib. To avoid this I think (after seeing the std lib of the D language) it can be useful to put all modules of the standard library into a namespace, like "py" or "std" or something like that. So you write: import py.math from py.math import sin x = py.math.cos(1.2) y = sin(1.2) Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list