boltons boltons should be builtins. Boltons is a set of pure-Python utilities in the same spirit as — and yet conspicuously missing from — the standard library, including: Atomic file saving, bolted on with fileutils A highly-optimized OrderedMultiDict, in dictutils Two types of PriorityQueue, in queueutils Chunked and windowed iteration, in iterutils A full-featured TracebackInfo type, for repre