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+"""odict.py: An Ordered Dictionary object"""
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+# Copyright (C) 2005 Nicola Larosa, Michael Foord
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+# E-mail: nico AT tekNico DOT net, fuzzyman AT voidspace DOT org DOT uk
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+# Copyright (c) 2003-2010, Michael Foord
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+# E-mail : fuzzyman AT voidspace DOT org DOT uk
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+#
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+# Redistribution and use in source and binary forms, with or without
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+# modification, are permitted provided that the following conditions are
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+# met:
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+#
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+#
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+# * Redistributions of source code must retain the above copyright
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+# notice, this list of conditions and the following disclaimer.
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+#
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+# * Redistributions in binary form must reproduce the above
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+# copyright notice, this list of conditions and the following
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+# disclaimer in the documentation and/or other materials provided
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+# with the distribution.
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+#
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+# * Neither the name of Michael Foord nor the name of Voidspace
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+# may be used to endorse or promote products derived from this
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+# software without specific prior written permission.
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+#
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+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+
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+
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+from __future__ import generators
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+import sys
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+import warnings
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+
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+
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+__docformat__ = "restructuredtext en"
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+__all__ = ['OrderedDict']
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+
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+
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+INTP_VER = sys.version_info[:2]
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+if INTP_VER < (2, 2):
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+ raise RuntimeError("Python v.2.2 or later required")
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+
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+
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+class OrderedDict(dict):
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+ """
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+ A class of dictionary that keeps the insertion order of keys.
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+
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+ All appropriate methods return keys, items, or values in an ordered way.
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+
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+ All normal dictionary methods are available. Update and comparison is
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+ restricted to other OrderedDict objects.
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+
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+ Various sequence methods are available, including the ability to explicitly
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+ mutate the key ordering.
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+
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+ __contains__ tests:
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+
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+ >>> d = OrderedDict(((1, 3),))
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+ >>> 1 in d
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+ 1
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+ >>> 4 in d
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+ 0
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+
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+ __getitem__ tests:
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+
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+ >>> OrderedDict(((1, 3), (3, 2), (2, 1)))[2]
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+ 1
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+ >>> OrderedDict(((1, 3), (3, 2), (2, 1)))[4]
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+ Traceback (most recent call last):
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+ KeyError: 4
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+
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+ __len__ tests:
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+
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+ >>> len(OrderedDict())
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+ 0
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+ >>> len(OrderedDict(((1, 3), (3, 2), (2, 1))))
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+ 3
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+
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+ get tests:
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+
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> d.get(1)
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+ 3
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+ >>> d.get(4) is None
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+ 1
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+ >>> d.get(4, 5)
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+ 5
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+ >>> d
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+ OrderedDict([(1, 3), (3, 2), (2, 1)])
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+
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+ has_key tests:
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+
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> d.has_key(1)
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+ 1
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+ >>> d.has_key(4)
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+ 0
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+ """
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+
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+ def __init__(self, init_val=(), strict=False):
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+ """
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+ Create a new ordered dictionary. Cannot init from a normal dict,
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+ nor from kwargs, since items order is undefined in those cases.
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+
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+ If the ``strict`` keyword argument is ``True`` (``False`` is the
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+ default) then when doing slice assignment - the ``OrderedDict`` you are
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+ assigning from *must not* contain any keys in the remaining dict.
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+
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+ >>> OrderedDict()
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+ OrderedDict([])
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+ >>> OrderedDict({1: 1})
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+ Traceback (most recent call last):
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+ TypeError: undefined order, cannot get items from dict
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+ >>> OrderedDict({1: 1}.items())
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+ OrderedDict([(1, 1)])
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> d
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+ OrderedDict([(1, 3), (3, 2), (2, 1)])
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+ >>> OrderedDict(d)
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+ OrderedDict([(1, 3), (3, 2), (2, 1)])
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+ """
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+ self.strict = strict
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+ dict.__init__(self)
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+ if isinstance(init_val, OrderedDict):
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+ self._sequence = init_val.keys()
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+ dict.update(self, init_val)
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+ elif isinstance(init_val, dict):
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+ # we lose compatibility with other ordered dict types this way
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+ raise TypeError('undefined order, cannot get items from dict')
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+ else:
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+ self._sequence = []
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+ self.update(init_val)
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+
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+### Special methods ###
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+
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+ def __delitem__(self, key):
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+ """
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> del d[3]
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+ >>> d
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+ OrderedDict([(1, 3), (2, 1)])
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+ >>> del d[3]
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+ Traceback (most recent call last):
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+ KeyError: 3
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+ >>> d[3] = 2
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+ >>> d
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+ OrderedDict([(1, 3), (2, 1), (3, 2)])
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+ >>> del d[0:1]
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+ >>> d
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+ OrderedDict([(2, 1), (3, 2)])
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+ """
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+ if isinstance(key, slice):
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+ # FIXME: efficiency?
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+ keys = self._sequence[key]
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+ for entry in keys:
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+ dict.__delitem__(self, entry)
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+ del self._sequence[key]
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+ else:
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+ # do the dict.__delitem__ *first* as it raises
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+ # the more appropriate error
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+ dict.__delitem__(self, key)
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+ self._sequence.remove(key)
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+
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+ def __eq__(self, other):
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+ """
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> d == OrderedDict(d)
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+ True
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+ >>> d == OrderedDict(((1, 3), (2, 1), (3, 2)))
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+ False
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+ >>> d == OrderedDict(((1, 0), (3, 2), (2, 1)))
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+ False
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+ >>> d == OrderedDict(((0, 3), (3, 2), (2, 1)))
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+ False
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+ >>> d == dict(d)
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+ False
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+ >>> d == False
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+ False
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+ """
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+ if isinstance(other, OrderedDict):
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+ # FIXME: efficiency?
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+ # Generate both item lists for each compare
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+ return (self.items() == other.items())
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+ else:
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+ return False
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+
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+ def __lt__(self, other):
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+ """
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> c = OrderedDict(((0, 3), (3, 2), (2, 1)))
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+ >>> c < d
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+ True
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+ >>> d < c
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+ False
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+ >>> d < dict(c)
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+ Traceback (most recent call last):
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+ TypeError: Can only compare with other OrderedDicts
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+ """
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+ if not isinstance(other, OrderedDict):
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+ raise TypeError('Can only compare with other OrderedDicts')
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+ # FIXME: efficiency?
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+ # Generate both item lists for each compare
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+ return (self.items() < other.items())
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+
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+ def __le__(self, other):
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+ """
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> c = OrderedDict(((0, 3), (3, 2), (2, 1)))
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+ >>> e = OrderedDict(d)
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+ >>> c <= d
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+ True
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+ >>> d <= c
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+ False
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+ >>> d <= dict(c)
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+ Traceback (most recent call last):
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+ TypeError: Can only compare with other OrderedDicts
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+ >>> d <= e
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+ True
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+ """
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+ if not isinstance(other, OrderedDict):
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+ raise TypeError('Can only compare with other OrderedDicts')
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+ # FIXME: efficiency?
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+ # Generate both item lists for each compare
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+ return (self.items() <= other.items())
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+
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+ def __ne__(self, other):
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+ """
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> d != OrderedDict(d)
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+ False
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+ >>> d != OrderedDict(((1, 3), (2, 1), (3, 2)))
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+ True
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+ >>> d != OrderedDict(((1, 0), (3, 2), (2, 1)))
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+ True
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+ >>> d == OrderedDict(((0, 3), (3, 2), (2, 1)))
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+ False
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+ >>> d != dict(d)
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+ True
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+ >>> d != False
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+ True
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+ """
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+ if isinstance(other, OrderedDict):
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+ # FIXME: efficiency?
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+ # Generate both item lists for each compare
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+ return not (self.items() == other.items())
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+ else:
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+ return True
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+
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+ def __gt__(self, other):
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+ """
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> c = OrderedDict(((0, 3), (3, 2), (2, 1)))
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+ >>> d > c
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+ True
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+ >>> c > d
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+ False
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+ >>> d > dict(c)
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+ Traceback (most recent call last):
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+ TypeError: Can only compare with other OrderedDicts
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+ """
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+ if not isinstance(other, OrderedDict):
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+ raise TypeError('Can only compare with other OrderedDicts')
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+ # FIXME: efficiency?
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+ # Generate both item lists for each compare
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+ return (self.items() > other.items())
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+
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+ def __ge__(self, other):
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+ """
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+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
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+ >>> c = OrderedDict(((0, 3), (3, 2), (2, 1)))
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+ >>> e = OrderedDict(d)
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+ >>> c >= d
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+ False
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+ >>> d >= c
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+ True
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+ >>> d >= dict(c)
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+ Traceback (most recent call last):
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+ TypeError: Can only compare with other OrderedDicts
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+ >>> e >= d
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+ True
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+ """
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+ if not isinstance(other, OrderedDict):
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+ raise TypeError('Can only compare with other OrderedDicts')
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+ # FIXME: efficiency?
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+ # Generate both item lists for each compare
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+ return (self.items() >= other.items())
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+
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+ def __repr__(self):
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+ """
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+ Used for __repr__ and __str__
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+
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+ >>> r1 = repr(OrderedDict((('a', 'b'), ('c', 'd'), ('e', 'f'))))
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+ >>> r1
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+ "OrderedDict([('a', 'b'), ('c', 'd'), ('e', 'f')])"
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+ >>> r2 = repr(OrderedDict((('a', 'b'), ('e', 'f'), ('c', 'd'))))
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+ >>> r2
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+ "OrderedDict([('a', 'b'), ('e', 'f'), ('c', 'd')])"
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+ >>> r1 == str(OrderedDict((('a', 'b'), ('c', 'd'), ('e', 'f'))))
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+ True
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+ >>> r2 == str(OrderedDict((('a', 'b'), ('e', 'f'), ('c', 'd'))))
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+ True
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+ """
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+ return '%s([%s])' % (self.__class__.__name__, ', '.join(
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+ ['(%r, %r)' % (key, self[key]) for key in self._sequence]))
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+
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+ def __setitem__(self, key, val):
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+ """
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+ Allows slice assignment, so long as the slice is an OrderedDict
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+ >>> d = OrderedDict()
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+ >>> d['a'] = 'b'
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|
+ >>> d['b'] = 'a'
|
|
|
|
|
+ >>> d[3] = 12
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([('a', 'b'), ('b', 'a'), (3, 12)])
|
|
|
|
|
+ >>> d[:] = OrderedDict(((1, 2), (2, 3), (3, 4)))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> d[::2] = OrderedDict(((7, 8), (9, 10)))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(7, 8), (2, 3), (9, 10)])
|
|
|
|
|
+ >>> d = OrderedDict(((0, 1), (1, 2), (2, 3), (3, 4)))
|
|
|
|
|
+ >>> d[1:3] = OrderedDict(((1, 2), (5, 6), (7, 8)))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(0, 1), (1, 2), (5, 6), (7, 8), (3, 4)])
|
|
|
|
|
+ >>> d = OrderedDict(((0, 1), (1, 2), (2, 3), (3, 4)), strict=True)
|
|
|
|
|
+ >>> d[1:3] = OrderedDict(((1, 2), (5, 6), (7, 8)))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(0, 1), (1, 2), (5, 6), (7, 8), (3, 4)])
|
|
|
|
|
+
|
|
|
|
|
+ >>> a = OrderedDict(((0, 1), (1, 2), (2, 3)), strict=True)
|
|
|
|
|
+ >>> a[3] = 4
|
|
|
|
|
+ >>> a
|
|
|
|
|
+ OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a[::1] = OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a
|
|
|
|
|
+ OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a[:2] = OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4), (4, 5)])
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ ValueError: slice assignment must be from unique keys
|
|
|
|
|
+ >>> a = OrderedDict(((0, 1), (1, 2), (2, 3)))
|
|
|
|
|
+ >>> a[3] = 4
|
|
|
|
|
+ >>> a
|
|
|
|
|
+ OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a[::1] = OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a
|
|
|
|
|
+ OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a[:2] = OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a
|
|
|
|
|
+ OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a[::-1] = OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> a
|
|
|
|
|
+ OrderedDict([(3, 4), (2, 3), (1, 2), (0, 1)])
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> d[:1] = 3
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ TypeError: slice assignment requires an OrderedDict
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict([(0, 1), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ >>> d[:1] = OrderedDict([(9, 8)])
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(9, 8), (1, 2), (2, 3), (3, 4)])
|
|
|
|
|
+ """
|
|
|
|
|
+ if isinstance(key, slice):
|
|
|
|
|
+ if not isinstance(val, OrderedDict):
|
|
|
|
|
+ # FIXME: allow a list of tuples?
|
|
|
|
|
+ raise TypeError('slice assignment requires an OrderedDict')
|
|
|
|
|
+ keys = self._sequence[key]
|
|
|
|
|
+ # NOTE: Could use ``range(*key.indices(len(self._sequence)))``
|
|
|
|
|
+ indexes = range(len(self._sequence))[key]
|
|
|
|
|
+ if key.step is None:
|
|
|
|
|
+ # NOTE: new slice may not be the same size as the one being
|
|
|
|
|
+ # overwritten !
|
|
|
|
|
+ # NOTE: What is the algorithm for an impossible slice?
|
|
|
|
|
+ # e.g. d[5:3]
|
|
|
|
|
+ pos = key.start or 0
|
|
|
|
|
+ del self[key]
|
|
|
|
|
+ newkeys = val.keys()
|
|
|
|
|
+ for k in newkeys:
|
|
|
|
|
+ if k in self:
|
|
|
|
|
+ if self.strict:
|
|
|
|
|
+ raise ValueError('slice assignment must be from '
|
|
|
|
|
+ 'unique keys')
|
|
|
|
|
+ else:
|
|
|
|
|
+ # NOTE: This removes duplicate keys *first*
|
|
|
|
|
+ # so start position might have changed?
|
|
|
|
|
+ del self[k]
|
|
|
|
|
+ self._sequence = (self._sequence[:pos] + newkeys +
|
|
|
|
|
+ self._sequence[pos:])
|
|
|
|
|
+ dict.update(self, val)
|
|
|
|
|
+ else:
|
|
|
|
|
+ # extended slice - length of new slice must be the same
|
|
|
|
|
+ # as the one being replaced
|
|
|
|
|
+ if len(keys) != len(val):
|
|
|
|
|
+ raise ValueError('attempt to assign sequence of size %s '
|
|
|
|
|
+ 'to extended slice of size %s' % (len(val), len(keys)))
|
|
|
|
|
+ # FIXME: efficiency?
|
|
|
|
|
+ del self[key]
|
|
|
|
|
+ item_list = zip(indexes, val.items())
|
|
|
|
|
+ # smallest indexes first - higher indexes not guaranteed to
|
|
|
|
|
+ # exist
|
|
|
|
|
+ item_list.sort()
|
|
|
|
|
+ for pos, (newkey, newval) in item_list:
|
|
|
|
|
+ if self.strict and newkey in self:
|
|
|
|
|
+ raise ValueError('slice assignment must be from unique'
|
|
|
|
|
+ ' keys')
|
|
|
|
|
+ self.insert(pos, newkey, newval)
|
|
|
|
|
+ else:
|
|
|
|
|
+ if key not in self:
|
|
|
|
|
+ self._sequence.append(key)
|
|
|
|
|
+ dict.__setitem__(self, key, val)
|
|
|
|
|
+
|
|
|
|
|
+ def __getitem__(self, key):
|
|
|
|
|
+ """
|
|
|
|
|
+ Allows slicing. Returns an OrderedDict if you slice.
|
|
|
|
|
+ >>> b = OrderedDict([(7, 0), (6, 1), (5, 2), (4, 3), (3, 4), (2, 5), (1, 6)])
|
|
|
|
|
+ >>> b[::-1]
|
|
|
|
|
+ OrderedDict([(1, 6), (2, 5), (3, 4), (4, 3), (5, 2), (6, 1), (7, 0)])
|
|
|
|
|
+ >>> b[2:5]
|
|
|
|
|
+ OrderedDict([(5, 2), (4, 3), (3, 4)])
|
|
|
|
|
+ >>> type(b[2:4])
|
|
|
|
|
+ <class '__main__.OrderedDict'>
|
|
|
|
|
+ """
|
|
|
|
|
+ if isinstance(key, slice):
|
|
|
|
|
+ # FIXME: does this raise the error we want?
|
|
|
|
|
+ keys = self._sequence[key]
|
|
|
|
|
+ # FIXME: efficiency?
|
|
|
|
|
+ return OrderedDict([(entry, self[entry]) for entry in keys])
|
|
|
|
|
+ else:
|
|
|
|
|
+ return dict.__getitem__(self, key)
|
|
|
|
|
+
|
|
|
|
|
+ __str__ = __repr__
|
|
|
|
|
+
|
|
|
|
|
+ def __setattr__(self, name, value):
|
|
|
|
|
+ """
|
|
|
|
|
+ Implemented so that accesses to ``sequence`` raise a warning and are
|
|
|
|
|
+ diverted to the new ``setkeys`` method.
|
|
|
|
|
+ """
|
|
|
|
|
+ if name == 'sequence':
|
|
|
|
|
+ warnings.warn('Use of the sequence attribute is deprecated.'
|
|
|
|
|
+ ' Use the keys method instead.', DeprecationWarning)
|
|
|
|
|
+ # NOTE: doesn't return anything
|
|
|
|
|
+ self.setkeys(value)
|
|
|
|
|
+ else:
|
|
|
|
|
+ # FIXME: do we want to allow arbitrary setting of attributes?
|
|
|
|
|
+ # Or do we want to manage it?
|
|
|
|
|
+ object.__setattr__(self, name, value)
|
|
|
|
|
+
|
|
|
|
|
+ def __getattr__(self, name):
|
|
|
|
|
+ """
|
|
|
|
|
+ Implemented so that access to ``sequence`` raises a warning.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict()
|
|
|
|
|
+ >>> d.sequence
|
|
|
|
|
+ []
|
|
|
|
|
+ """
|
|
|
|
|
+ if name == 'sequence':
|
|
|
|
|
+ warnings.warn('Use of the sequence attribute is deprecated.'
|
|
|
|
|
+ ' Use the keys method instead.', DeprecationWarning)
|
|
|
|
|
+ # NOTE: Still (currently) returns a direct reference. Need to
|
|
|
|
|
+ # because code that uses sequence will expect to be able to
|
|
|
|
|
+ # mutate it in place.
|
|
|
|
|
+ return self._sequence
|
|
|
|
|
+ else:
|
|
|
|
|
+ # raise the appropriate error
|
|
|
|
|
+ raise AttributeError("OrderedDict has no '%s' attribute" % name)
|
|
|
|
|
+
|
|
|
|
|
+ def __deepcopy__(self, memo):
|
|
|
|
|
+ """
|
|
|
|
|
+ To allow deepcopy to work with OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ >>> from copy import deepcopy
|
|
|
|
|
+ >>> a = OrderedDict([(1, 1), (2, 2), (3, 3)])
|
|
|
|
|
+ >>> a['test'] = {}
|
|
|
|
|
+ >>> b = deepcopy(a)
|
|
|
|
|
+ >>> b == a
|
|
|
|
|
+ True
|
|
|
|
|
+ >>> b is a
|
|
|
|
|
+ False
|
|
|
|
|
+ >>> a['test'] is b['test']
|
|
|
|
|
+ False
|
|
|
|
|
+ """
|
|
|
|
|
+ from copy import deepcopy
|
|
|
|
|
+ return self.__class__(deepcopy(self.items(), memo), self.strict)
|
|
|
|
|
+
|
|
|
|
|
+### Read-only methods ###
|
|
|
|
|
+
|
|
|
|
|
+ def copy(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ >>> OrderedDict(((1, 3), (3, 2), (2, 1))).copy()
|
|
|
|
|
+ OrderedDict([(1, 3), (3, 2), (2, 1)])
|
|
|
|
|
+ """
|
|
|
|
|
+ return OrderedDict(self)
|
|
|
|
|
+
|
|
|
|
|
+ def items(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ ``items`` returns a list of tuples representing all the
|
|
|
|
|
+ ``(key, value)`` pairs in the dictionary.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.items()
|
|
|
|
|
+ [(1, 3), (3, 2), (2, 1)]
|
|
|
|
|
+ >>> d.clear()
|
|
|
|
|
+ >>> d.items()
|
|
|
|
|
+ []
|
|
|
|
|
+ """
|
|
|
|
|
+ return zip(self._sequence, self.values())
|
|
|
|
|
+
|
|
|
|
|
+ def keys(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ Return a list of keys in the ``OrderedDict``.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.keys()
|
|
|
|
|
+ [1, 3, 2]
|
|
|
|
|
+ """
|
|
|
|
|
+ return self._sequence[:]
|
|
|
|
|
+
|
|
|
|
|
+ def values(self, values=None):
|
|
|
|
|
+ """
|
|
|
|
|
+ Return a list of all the values in the OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ Optionally you can pass in a list of values, which will replace the
|
|
|
|
|
+ current list. The value list must be the same len as the OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.values()
|
|
|
|
|
+ [3, 2, 1]
|
|
|
|
|
+ """
|
|
|
|
|
+ return [self[key] for key in self._sequence]
|
|
|
|
|
+
|
|
|
|
|
+ def iteritems(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ >>> ii = OrderedDict(((1, 3), (3, 2), (2, 1))).iteritems()
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ (1, 3)
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ (3, 2)
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ (2, 1)
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ StopIteration
|
|
|
|
|
+ """
|
|
|
|
|
+ def make_iter(self=self):
|
|
|
|
|
+ keys = self.iterkeys()
|
|
|
|
|
+ while True:
|
|
|
|
|
+ key = keys.next()
|
|
|
|
|
+ yield (key, self[key])
|
|
|
|
|
+ return make_iter()
|
|
|
|
|
+
|
|
|
|
|
+ def iterkeys(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ >>> ii = OrderedDict(((1, 3), (3, 2), (2, 1))).iterkeys()
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ 1
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ 3
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ 2
|
|
|
|
|
+ >>> ii.next()
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ StopIteration
|
|
|
|
|
+ """
|
|
|
|
|
+ return iter(self._sequence)
|
|
|
|
|
+
|
|
|
|
|
+ __iter__ = iterkeys
|
|
|
|
|
+
|
|
|
|
|
+ def itervalues(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ >>> iv = OrderedDict(((1, 3), (3, 2), (2, 1))).itervalues()
|
|
|
|
|
+ >>> iv.next()
|
|
|
|
|
+ 3
|
|
|
|
|
+ >>> iv.next()
|
|
|
|
|
+ 2
|
|
|
|
|
+ >>> iv.next()
|
|
|
|
|
+ 1
|
|
|
|
|
+ >>> iv.next()
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ StopIteration
|
|
|
|
|
+ """
|
|
|
|
|
+ def make_iter(self=self):
|
|
|
|
|
+ keys = self.iterkeys()
|
|
|
|
|
+ while True:
|
|
|
|
|
+ yield self[keys.next()]
|
|
|
|
|
+ return make_iter()
|
|
|
|
|
+
|
|
|
|
|
+### Read-write methods ###
|
|
|
|
|
+
|
|
|
|
|
+ def clear(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.clear()
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([])
|
|
|
|
|
+ """
|
|
|
|
|
+ dict.clear(self)
|
|
|
|
|
+ self._sequence = []
|
|
|
|
|
+
|
|
|
|
|
+ def pop(self, key, *args):
|
|
|
|
|
+ """
|
|
|
|
|
+ No dict.pop in Python 2.2, gotta reimplement it
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.pop(3)
|
|
|
|
|
+ 2
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 3), (2, 1)])
|
|
|
|
|
+ >>> d.pop(4)
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ KeyError: 4
|
|
|
|
|
+ >>> d.pop(4, 0)
|
|
|
|
|
+ 0
|
|
|
|
|
+ >>> d.pop(4, 0, 1)
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ TypeError: pop expected at most 2 arguments, got 3
|
|
|
|
|
+ """
|
|
|
|
|
+ if len(args) > 1:
|
|
|
|
|
+ raise TypeError('pop expected at most 2 arguments, got %s' %
|
|
|
|
|
+ (len(args) + 1))
|
|
|
|
|
+ if key in self:
|
|
|
|
|
+ val = self[key]
|
|
|
|
|
+ del self[key]
|
|
|
|
|
+ else:
|
|
|
|
|
+ try:
|
|
|
|
|
+ val = args[0]
|
|
|
|
|
+ except IndexError:
|
|
|
|
|
+ raise KeyError(key)
|
|
|
|
|
+ return val
|
|
|
|
|
+
|
|
|
|
|
+ def popitem(self, i=-1):
|
|
|
|
|
+ """
|
|
|
|
|
+ Delete and return an item specified by index, not a random one as in
|
|
|
|
|
+ dict. The index is -1 by default (the last item).
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.popitem()
|
|
|
|
|
+ (2, 1)
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 3), (3, 2)])
|
|
|
|
|
+ >>> d.popitem(0)
|
|
|
|
|
+ (1, 3)
|
|
|
|
|
+ >>> OrderedDict().popitem()
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ KeyError: 'popitem(): dictionary is empty'
|
|
|
|
|
+ >>> d.popitem(2)
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ IndexError: popitem(): index 2 not valid
|
|
|
|
|
+ """
|
|
|
|
|
+ if not self._sequence:
|
|
|
|
|
+ raise KeyError('popitem(): dictionary is empty')
|
|
|
|
|
+ try:
|
|
|
|
|
+ key = self._sequence[i]
|
|
|
|
|
+ except IndexError:
|
|
|
|
|
+ raise IndexError('popitem(): index %s not valid' % i)
|
|
|
|
|
+ return (key, self.pop(key))
|
|
|
|
|
+
|
|
|
|
|
+ def setdefault(self, key, defval=None):
|
|
|
|
|
+ """
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.setdefault(1)
|
|
|
|
|
+ 3
|
|
|
|
|
+ >>> d.setdefault(4) is None
|
|
|
|
|
+ True
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 3), (3, 2), (2, 1), (4, None)])
|
|
|
|
|
+ >>> d.setdefault(5, 0)
|
|
|
|
|
+ 0
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 3), (3, 2), (2, 1), (4, None), (5, 0)])
|
|
|
|
|
+ """
|
|
|
|
|
+ if key in self:
|
|
|
|
|
+ return self[key]
|
|
|
|
|
+ else:
|
|
|
|
|
+ self[key] = defval
|
|
|
|
|
+ return defval
|
|
|
|
|
+
|
|
|
|
|
+ def update(self, from_od):
|
|
|
|
|
+ """
|
|
|
|
|
+ Update from another OrderedDict or sequence of (key, value) pairs
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 0), (0, 1)))
|
|
|
|
|
+ >>> d.update(OrderedDict(((1, 3), (3, 2), (2, 1))))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 3), (0, 1), (3, 2), (2, 1)])
|
|
|
|
|
+ >>> d.update({4: 4})
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ TypeError: undefined order, cannot get items from dict
|
|
|
|
|
+ >>> d.update((4, 4))
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ TypeError: cannot convert dictionary update sequence element "4" to a 2-item sequence
|
|
|
|
|
+ """
|
|
|
|
|
+ if isinstance(from_od, OrderedDict):
|
|
|
|
|
+ for key, val in from_od.items():
|
|
|
|
|
+ self[key] = val
|
|
|
|
|
+ elif isinstance(from_od, dict):
|
|
|
|
|
+ # we lose compatibility with other ordered dict types this way
|
|
|
|
|
+ raise TypeError('undefined order, cannot get items from dict')
|
|
|
|
|
+ else:
|
|
|
|
|
+ # FIXME: efficiency?
|
|
|
|
|
+ # sequence of 2-item sequences, or error
|
|
|
|
|
+ for item in from_od:
|
|
|
|
|
+ try:
|
|
|
|
|
+ key, val = item
|
|
|
|
|
+ except TypeError:
|
|
|
|
|
+ raise TypeError('cannot convert dictionary update'
|
|
|
|
|
+ ' sequence element "%s" to a 2-item sequence' % item)
|
|
|
|
|
+ self[key] = val
|
|
|
|
|
+
|
|
|
|
|
+ def rename(self, old_key, new_key):
|
|
|
|
|
+ """
|
|
|
|
|
+ Rename the key for a given value, without modifying sequence order.
|
|
|
|
|
+
|
|
|
|
|
+ For the case where new_key already exists this raise an exception,
|
|
|
|
|
+ since if new_key exists, it is ambiguous as to what happens to the
|
|
|
|
|
+ associated values, and the position of new_key in the sequence.
|
|
|
|
|
+
|
|
|
|
|
+ >>> od = OrderedDict()
|
|
|
|
|
+ >>> od['a'] = 1
|
|
|
|
|
+ >>> od['b'] = 2
|
|
|
|
|
+ >>> od.items()
|
|
|
|
|
+ [('a', 1), ('b', 2)]
|
|
|
|
|
+ >>> od.rename('b', 'c')
|
|
|
|
|
+ >>> od.items()
|
|
|
|
|
+ [('a', 1), ('c', 2)]
|
|
|
|
|
+ >>> od.rename('c', 'a')
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ ValueError: New key already exists: 'a'
|
|
|
|
|
+ >>> od.rename('d', 'b')
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ KeyError: 'd'
|
|
|
|
|
+ """
|
|
|
|
|
+ if new_key == old_key:
|
|
|
|
|
+ # no-op
|
|
|
|
|
+ return
|
|
|
|
|
+ if new_key in self:
|
|
|
|
|
+ raise ValueError("New key already exists: %r" % new_key)
|
|
|
|
|
+ # rename sequence entry
|
|
|
|
|
+ value = self[old_key]
|
|
|
|
|
+ old_idx = self._sequence.index(old_key)
|
|
|
|
|
+ self._sequence[old_idx] = new_key
|
|
|
|
|
+ # rename internal dict entry
|
|
|
|
|
+ dict.__delitem__(self, old_key)
|
|
|
|
|
+ dict.__setitem__(self, new_key, value)
|
|
|
|
|
+
|
|
|
|
|
+ def setitems(self, items):
|
|
|
|
|
+ """
|
|
|
|
|
+ This method allows you to set the items in the dict.
|
|
|
|
|
+
|
|
|
|
|
+ It takes a list of tuples - of the same sort returned by the ``items``
|
|
|
|
|
+ method.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict()
|
|
|
|
|
+ >>> d.setitems(((3, 1), (2, 3), (1, 2)))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(3, 1), (2, 3), (1, 2)])
|
|
|
|
|
+ """
|
|
|
|
|
+ self.clear()
|
|
|
|
|
+ # FIXME: this allows you to pass in an OrderedDict as well :-)
|
|
|
|
|
+ self.update(items)
|
|
|
|
|
+
|
|
|
|
|
+ def setkeys(self, keys):
|
|
|
|
|
+ """
|
|
|
|
|
+ ``setkeys`` all ows you to pass in a new list of keys which will
|
|
|
|
|
+ replace the current set. This must contain the same set of keys, but
|
|
|
|
|
+ need not be in the same order.
|
|
|
|
|
+
|
|
|
|
|
+ If you pass in new keys that don't match, a ``KeyError`` will be
|
|
|
|
|
+ raised.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.keys()
|
|
|
|
|
+ [1, 3, 2]
|
|
|
|
|
+ >>> d.setkeys((1, 2, 3))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 3), (2, 1), (3, 2)])
|
|
|
|
|
+ >>> d.setkeys(['a', 'b', 'c'])
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ KeyError: 'Keylist is not the same as current keylist.'
|
|
|
|
|
+ """
|
|
|
|
|
+ # FIXME: Efficiency? (use set for Python 2.4 :-)
|
|
|
|
|
+ # NOTE: list(keys) rather than keys[:] because keys[:] returns
|
|
|
|
|
+ # a tuple, if keys is a tuple.
|
|
|
|
|
+ kcopy = list(keys)
|
|
|
|
|
+ kcopy.sort()
|
|
|
|
|
+ self._sequence.sort()
|
|
|
|
|
+ if kcopy != self._sequence:
|
|
|
|
|
+ raise KeyError('Keylist is not the same as current keylist.')
|
|
|
|
|
+ # NOTE: This makes the _sequence attribute a new object, instead
|
|
|
|
|
+ # of changing it in place.
|
|
|
|
|
+ # FIXME: efficiency?
|
|
|
|
|
+ self._sequence = list(keys)
|
|
|
|
|
+
|
|
|
|
|
+ def setvalues(self, values):
|
|
|
|
|
+ """
|
|
|
|
|
+ You can pass in a list of values, which will replace the
|
|
|
|
|
+ current list. The value list must be the same len as the OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ (Or a ``ValueError`` is raised.)
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.setvalues((1, 2, 3))
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 1), (3, 2), (2, 3)])
|
|
|
|
|
+ >>> d.setvalues([6])
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ ValueError: Value list is not the same length as the OrderedDict.
|
|
|
|
|
+ """
|
|
|
|
|
+ if len(values) != len(self):
|
|
|
|
|
+ # FIXME: correct error to raise?
|
|
|
|
|
+ raise ValueError('Value list is not the same length as the '
|
|
|
|
|
+ 'OrderedDict.')
|
|
|
|
|
+ self.update(zip(self, values))
|
|
|
|
|
+
|
|
|
|
|
+### Sequence Methods ###
|
|
|
|
|
+
|
|
|
|
|
+ def index(self, key):
|
|
|
|
|
+ """
|
|
|
|
|
+ Return the position of the specified key in the OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.index(3)
|
|
|
|
|
+ 1
|
|
|
|
|
+ >>> d.index(4)
|
|
|
|
|
+ Traceback (most recent call last):
|
|
|
|
|
+ ValueError: 4 is not in list
|
|
|
|
|
+ """
|
|
|
|
|
+ return self._sequence.index(key)
|
|
|
|
|
+
|
|
|
|
|
+ def insert(self, index, key, value):
|
|
|
|
|
+ """
|
|
|
|
|
+ Takes ``index``, ``key``, and ``value`` as arguments.
|
|
|
|
|
+
|
|
|
|
|
+ Sets ``key`` to ``value``, so that ``key`` is at position ``index`` in
|
|
|
|
|
+ the OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.insert(0, 4, 0)
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(4, 0), (1, 3), (3, 2), (2, 1)])
|
|
|
|
|
+ >>> d.insert(0, 2, 1)
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(2, 1), (4, 0), (1, 3), (3, 2)])
|
|
|
|
|
+ >>> d.insert(8, 8, 1)
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(2, 1), (4, 0), (1, 3), (3, 2), (8, 1)])
|
|
|
|
|
+ """
|
|
|
|
|
+ if key in self:
|
|
|
|
|
+ # FIXME: efficiency?
|
|
|
|
|
+ del self[key]
|
|
|
|
|
+ self._sequence.insert(index, key)
|
|
|
|
|
+ dict.__setitem__(self, key, value)
|
|
|
|
|
+
|
|
|
|
|
+ def reverse(self):
|
|
|
|
|
+ """
|
|
|
|
|
+ Reverse the order of the OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((1, 3), (3, 2), (2, 1)))
|
|
|
|
|
+ >>> d.reverse()
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(2, 1), (3, 2), (1, 3)])
|
|
|
|
|
+ """
|
|
|
|
|
+ self._sequence.reverse()
|
|
|
|
|
+
|
|
|
|
|
+ def sort(self, *args, **kwargs):
|
|
|
|
|
+ """
|
|
|
|
|
+ Sort the key order in the OrderedDict.
|
|
|
|
|
+
|
|
|
|
|
+ This method takes the same arguments as the ``list.sort`` method on
|
|
|
|
|
+ your version of Python.
|
|
|
|
|
+
|
|
|
|
|
+ >>> d = OrderedDict(((4, 1), (2, 2), (3, 3), (1, 4)))
|
|
|
|
|
+ >>> d.sort()
|
|
|
|
|
+ >>> d
|
|
|
|
|
+ OrderedDict([(1, 4), (2, 2), (3, 3), (4, 1)])
|
|
|
|
|
+ """
|
|
|
|
|
+ self._sequence.sort(*args, **kwargs)
|
|
|
|
|
+
|
|
|
|
|
+
|
|
|
|
|
+if __name__ == '__main__':
|
|
|
|
|
+ # turn off warnings for tests
|
|
|
|
|
+ warnings.filterwarnings('ignore')
|
|
|
|
|
+ # run the code tests in doctest format
|
|
|
|
|
+ import doctest
|
|
|
|
|
+ m = sys.modules.get('__main__')
|
|
|
|
|
+ globs = m.__dict__.copy()
|
|
|
|
|
+ globs.update({
|
|
|
|
|
+ 'INTP_VER': INTP_VER,
|
|
|
|
|
+ })
|
|
|
|
|
+ doctest.testmod(m, globs=globs)
|