Mercurial > repos > shellac > sam_consensus_v3
view env/lib/python3.9/site-packages/galaxy/util/oset.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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""" Ordered set implementation from https://code.activestate.com/recipes/576694/ """ from collections.abc import MutableSet class OrderedSet(MutableSet): def __init__(self, iterable=None): self.end = end = [] end += [None, end, end] # sentinel node for doubly linked list self.map = {} # key --> [key, prev, next] if iterable is not None: self |= iterable def __len__(self): return len(self.map) def __contains__(self, key): return key in self.map def add(self, key): if key not in self.map: end = self.end curr = end[1] curr[2] = end[1] = self.map[key] = [key, curr, end] def discard(self, key): if key in self.map: key, prev, next = self.map.pop(key) prev[2] = next next[1] = prev def __iter__(self): end = self.end curr = end[2] while curr is not end: yield curr[0] curr = curr[2] def __reversed__(self): end = self.end curr = end[1] while curr is not end: yield curr[0] curr = curr[1] def pop(self, last=True): if not self: raise KeyError('set is empty') key = self.end[1][0] if last else self.end[2][0] self.discard(key) return key def __repr__(self): if not self: return f'{self.__class__.__name__}()' return '{}({!r})'.format(self.__class__.__name__, list(self)) def __eq__(self, other): if isinstance(other, OrderedSet): return len(self) == len(other) and list(self) == list(other) return set(self) == set(other)