mirror of
https://github.com/valitydev/salt.git
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323 lines
13 KiB
Diff
323 lines
13 KiB
Diff
From cc437e7826eb2cc436844286f14b5eda87d333d0 Mon Sep 17 00:00:00 2001
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From: Pedro Algarvio <pedro@algarvio.me>
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Date: Wed, 29 May 2013 23:42:45 +0100
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Subject: [PATCH] Switched to a fixed and more complete `OrderedDict` recipe.
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Fixes #4912.
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---
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salt/utils/odict.py | 272 ++++++++++++++++++++++++++++++++++++++++++++--------
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1 file changed, 230 insertions(+), 42 deletions(-)
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diff --git a/salt/utils/odict.py b/salt/utils/odict.py
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index 9dd8959..ba2c8b3 100644
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--- a/salt/utils/odict.py
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+++ b/salt/utils/odict.py
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@@ -21,74 +21,262 @@
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try:
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from ordereddict import OrderedDict
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except ImportError:
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- from collections import MutableMapping
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+ ## {{{ http://code.activestate.com/recipes/576693/ (r9)
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+ # Backport of OrderedDict() class that runs on Python 2.4, 2.5, 2.6, 2.7 and pypy.
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+ # Passes Python2.7's test suite and incorporates all the latest updates.
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- class OrderedDict(dict, MutableMapping):
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- # This implementation is fully based on:
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- # http://code.activestate.com/recipes/576669/
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+ try:
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+ from thread import get_ident as _get_ident
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+ except ImportError:
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+ from dummy_thread import get_ident as _get_ident
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+
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+ try:
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+ from _abcoll import KeysView, ValuesView, ItemsView
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+ except ImportError:
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+ pass
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+
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+ class OrderedDict(dict):
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+ 'Dictionary that remembers insertion order'
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+ # An inherited dict maps keys to values.
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+ # The inherited dict provides __getitem__, __len__, __contains__, and get.
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+ # The remaining methods are order-aware.
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+ # Big-O running times for all methods are the same as for regular dictionaries.
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+
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+ # The internal self.__map dictionary maps keys to links in a doubly linked list.
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+ # The circular doubly linked list starts and ends with a sentinel element.
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+ # The sentinel element never gets deleted (this simplifies the algorithm).
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+ # Each link is stored as a list of length three: [PREV, NEXT, KEY].
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- # Methods with direct access to underlying attributes
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def __init__(self, *args, **kwds):
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- super(OrderedDict, self).__init__()
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- if len(args) > 1:
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- raise TypeError(
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- 'expected at 1 argument, got %d', len(args)
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- )
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- if not hasattr(self, '_keys'):
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- self._keys = []
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- self.update(*args, **kwds)
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+ '''Initialize an ordered dictionary. Signature is the same as for
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+ regular dictionaries, but keyword arguments are not recommended
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+ because their insertion order is arbitrary.
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- def clear(self):
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- del self._keys[:]
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- dict.clear(self)
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+ '''
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+ if len(args) > 1:
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+ raise TypeError('expected at most 1 arguments, got %d' % len(args))
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+ try:
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+ self.__root
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+ except AttributeError:
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+ self.__root = root = [] # sentinel node
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+ root[:] = [root, root, None]
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+ self.__map = {}
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+ self.__update(*args, **kwds)
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- def __setitem__(self, key, value):
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+ def __setitem__(self, key, value, dict_setitem=dict.__setitem__):
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+ 'od.__setitem__(i, y) <==> od[i]=y'
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+ # Setting a new item creates a new link which goes at the end of the linked
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+ # list, and the inherited dictionary is updated with the new key/value pair.
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if key not in self:
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- self._keys.append(key)
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- dict.__setitem__(self, key, value)
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+ root = self.__root
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+ last = root[0]
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+ last[1] = root[0] = self.__map[key] = [last, root, key]
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+ dict_setitem(self, key, value)
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- def __delitem__(self, key):
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- dict.__delitem__(self, key)
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- self._keys.remove(key)
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+ def __delitem__(self, key, dict_delitem=dict.__delitem__):
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+ 'od.__delitem__(y) <==> del od[y]'
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+ # Deleting an existing item uses self.__map to find the link which is
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+ # then removed by updating the links in the predecessor and successor nodes.
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+ dict_delitem(self, key)
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+ link_prev, link_next, key = self.__map.pop(key)
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+ link_prev[1] = link_next
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+ link_next[0] = link_prev
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def __iter__(self):
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- return iter(self._keys)
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+ 'od.__iter__() <==> iter(od)'
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+ root = self.__root
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+ curr = root[1]
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+ while curr is not root:
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+ yield curr[2]
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+ curr = curr[1]
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def __reversed__(self):
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- return reversed(self._keys)
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+ 'od.__reversed__() <==> reversed(od)'
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+ root = self.__root
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+ curr = root[0]
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+ while curr is not root:
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+ yield curr[2]
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+ curr = curr[0]
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+
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+ def clear(self):
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+ 'od.clear() -> None. Remove all items from od.'
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+ try:
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+ for node in self.__map.itervalues():
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+ del node[:]
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+ root = self.__root
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+ root[:] = [root, root, None]
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+ self.__map.clear()
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+ except AttributeError:
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+ pass
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+ dict.clear(self)
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- def popitem(self):
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+ def popitem(self, last=True):
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+ '''od.popitem() -> (k, v), return and remove a (key, value) pair.
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+ Pairs are returned in LIFO order if last is true or FIFO order if false.
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+
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+ '''
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if not self:
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- raise KeyError
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- key = self._keys.pop()
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+ raise KeyError('dictionary is empty')
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+ root = self.__root
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+ if last:
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+ link = root[0]
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+ link_prev = link[0]
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+ link_prev[1] = root
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+ root[0] = link_prev
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+ else:
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+ link = root[1]
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+ link_next = link[1]
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+ root[1] = link_next
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+ link_next[0] = root
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+ key = link[2]
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+ del self.__map[key]
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value = dict.pop(self, key)
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return key, value
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- def __reduce__(self):
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- items = [[k, self[k]] for k in self]
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- inst_dict = vars(self).copy()
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- inst_dict.pop('_keys', None)
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- return (self.__class__, (items,), inst_dict)
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+ # -- the following methods do not depend on the internal structure --
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+
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+ def keys(self):
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+ 'od.keys() -> list of keys in od'
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+ return list(self)
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+
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+ def values(self):
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+ 'od.values() -> list of values in od'
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+ return [self[key] for key in self]
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+
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+ def items(self):
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+ 'od.items() -> list of (key, value) pairs in od'
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+ return [(key, self[key]) for key in self]
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+
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+ def iterkeys(self):
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+ 'od.iterkeys() -> an iterator over the keys in od'
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+ return iter(self)
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+
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+ def itervalues(self):
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+ 'od.itervalues -> an iterator over the values in od'
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+ for k in self:
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+ yield self[k]
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- # Methods with indirect access via the above methods
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+ def iteritems(self):
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+ 'od.iteritems -> an iterator over the (key, value) items in od'
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+ for k in self:
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+ yield (k, self[k])
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- setdefault = MutableMapping.setdefault
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- update = MutableMapping.update
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- pop = MutableMapping.pop
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- keys = MutableMapping.keys
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- values = MutableMapping.values
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- items = MutableMapping.items
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+ def update(*args, **kwds):
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+ '''od.update(E, **F) -> None. Update od from dict/iterable E and F.
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- def __repr__(self):
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- pairs = ', '.join(map('%r: %r'.__mod__, self.items()))
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- return '%s({%s})' % (self.__class__.__name__, pairs)
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+ If E is a dict instance, does: for k in E: od[k] = E[k]
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+ If E has a .keys() method, does: for k in E.keys(): od[k] = E[k]
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+ Or if E is an iterable of items, does: for k, v in E: od[k] = v
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+ In either case, this is followed by: for k, v in F.items(): od[k] = v
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+
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+ '''
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+ if len(args) > 2:
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+ raise TypeError('update() takes at most 2 positional '
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+ 'arguments (%d given)' % (len(args),))
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+ elif not args:
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+ raise TypeError('update() takes at least 1 argument (0 given)')
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+ self = args[0]
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+ # Make progressively weaker assumptions about "other"
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+ other = ()
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+ if len(args) == 2:
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+ other = args[1]
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+ if isinstance(other, dict):
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+ for key in other:
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+ self[key] = other[key]
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+ elif hasattr(other, 'keys'):
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+ for key in other.keys():
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+ self[key] = other[key]
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+ else:
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+ for key, value in other:
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+ self[key] = value
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+ for key, value in kwds.items():
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+ self[key] = value
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+
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+ __update = update # let subclasses override update without breaking __init__
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+
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+ __marker = object()
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+
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+ def pop(self, key, default=__marker):
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+ '''od.pop(k[,d]) -> v, remove specified key and return the corresponding value.
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+ If key is not found, d is returned if given, otherwise KeyError is raised.
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+
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+ '''
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+ if key in self:
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+ result = self[key]
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+ del self[key]
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+ return result
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+ if default is self.__marker:
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+ raise KeyError(key)
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+ return default
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+
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+ def setdefault(self, key, default=None):
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+ 'od.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in od'
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+ if key in self:
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+ return self[key]
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+ self[key] = default
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+ return default
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+
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+ def __repr__(self, _repr_running={}):
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+ 'od.__repr__() <==> repr(od)'
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+ call_key = id(self), _get_ident()
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+ if call_key in _repr_running:
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+ return '...'
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+ _repr_running[call_key] = 1
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+ try:
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+ if not self:
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+ return '%s()' % (self.__class__.__name__,)
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+ return '%s(%r)' % (self.__class__.__name__, self.items())
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+ finally:
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+ del _repr_running[call_key]
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+
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+ def __reduce__(self):
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+ 'Return state information for pickling'
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+ items = [[k, self[k]] for k in self]
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+ inst_dict = vars(self).copy()
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+ for k in vars(OrderedDict()):
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+ inst_dict.pop(k, None)
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+ if inst_dict:
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+ return (self.__class__, (items,), inst_dict)
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+ return self.__class__, (items,)
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def copy(self):
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+ 'od.copy() -> a shallow copy of od'
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return self.__class__(self)
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@classmethod
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def fromkeys(cls, iterable, value=None):
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+ '''OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S
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+ and values equal to v (which defaults to None).
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+
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+ '''
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d = cls()
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for key in iterable:
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d[key] = value
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return d
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+
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+ def __eq__(self, other):
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+ '''od.__eq__(y) <==> od==y. Comparison to another OD is order-sensitive
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+ while comparison to a regular mapping is order-insensitive.
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+
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+ '''
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+ if isinstance(other, OrderedDict):
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+ return len(self)==len(other) and self.items() == other.items()
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+ return dict.__eq__(self, other)
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+
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+ def __ne__(self, other):
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+ return not self == other
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+
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+ # -- the following methods are only used in Python 2.7 --
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+
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+ def viewkeys(self):
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+ "od.viewkeys() -> a set-like object providing a view on od's keys"
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+ return KeysView(self)
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+
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+ def viewvalues(self):
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+ "od.viewvalues() -> an object providing a view on od's values"
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+ return ValuesView(self)
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+
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+ def viewitems(self):
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+ "od.viewitems() -> a set-like object providing a view on od's items"
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+ return ItemsView(self)
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+ ## end of http://code.activestate.com/recipes/576693/ }}}
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--
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1.8.1.6
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