Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/galaxy/util/oset.py @ 2:6af9afd405e9 draft

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"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
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1 """
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2 Ordered set implementation from https://code.activestate.com/recipes/576694/
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3 """
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4 import collections
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5
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6
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7 class OrderedSet(collections.MutableSet):
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8 def __init__(self, iterable=None):
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9 self.end = end = []
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10 end += [None, end, end] # sentinel node for doubly linked list
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11 self.map = {} # key --> [key, prev, next]
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12 if iterable is not None:
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13 self |= iterable
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14
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15 def __len__(self):
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16 return len(self.map)
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17
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18 def __contains__(self, key):
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19 return key in self.map
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20
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21 def add(self, key):
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22 if key not in self.map:
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23 end = self.end
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24 curr = end[1]
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25 curr[2] = end[1] = self.map[key] = [key, curr, end]
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26
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27 def discard(self, key):
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28 if key in self.map:
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29 key, prev, next = self.map.pop(key)
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30 prev[2] = next
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31 next[1] = prev
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32
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33 def __iter__(self):
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34 end = self.end
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35 curr = end[2]
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36 while curr is not end:
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37 yield curr[0]
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38 curr = curr[2]
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39
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40 def __reversed__(self):
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41 end = self.end
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42 curr = end[1]
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43 while curr is not end:
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44 yield curr[0]
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45 curr = curr[1]
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46
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47 def pop(self, last=True):
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48 if not self:
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49 raise KeyError('set is empty')
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50 key = self.end[1][0] if last else self.end[2][0]
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51 self.discard(key)
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52 return key
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53
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54 def __repr__(self):
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55 if not self:
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56 return '%s()' % (self.__class__.__name__,)
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57 return '%s(%r)' % (self.__class__.__name__, list(self))
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58
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59 def __eq__(self, other):
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60 if isinstance(other, OrderedSet):
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61 return len(self) == len(other) and list(self) == list(other)
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62 return set(self) == set(other)