summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
authorNathan Binkert <nate@binkert.org>2008-06-14 20:19:49 -0700
committerNathan Binkert <nate@binkert.org>2008-06-14 20:19:49 -0700
commitf82d4e2364e9df683b6891c04efaa861093a50ec (patch)
tree07ea1e455a63c632643ef19cc3cfef6259e0beab /src
parentfe325c7f4341b25cae65cbe529caa0a46140501a (diff)
downloadgem5-f82d4e2364e9df683b6891c04efaa861093a50ec.tar.xz
python: Move various utility classes into a new m5.util package so
they're all in the same place. This also involves having just one jobfile.py and moving it into the utils directory to avoid duplication. Lots of improvements to the utility as well. --HG-- rename : src/python/m5/attrdict.py => src/python/m5/util/attrdict.py rename : util/pbs/jobfile.py => src/python/m5/util/jobfile.py rename : src/python/m5/util.py => src/python/m5/util/misc.py rename : src/python/m5/multidict.py => src/python/m5/util/multidict.py rename : util/stats/orderdict.py => src/python/m5/util/orderdict.py
Diffstat (limited to 'src')
-rw-r--r--src/python/SConscript8
-rw-r--r--src/python/m5/SimObject.py1
-rw-r--r--src/python/m5/main.py2
-rw-r--r--src/python/m5/util/__init__.py32
-rw-r--r--src/python/m5/util/attrdict.py (renamed from src/python/m5/attrdict.py)11
-rw-r--r--src/python/m5/util/jobfile.py450
-rw-r--r--src/python/m5/util/misc.py (renamed from src/python/m5/util.py)28
-rw-r--r--src/python/m5/util/multidict.py (renamed from src/python/m5/multidict.py)0
-rw-r--r--src/python/m5/util/orderdict.py80
9 files changed, 606 insertions, 6 deletions
diff --git a/src/python/SConscript b/src/python/SConscript
index b39c9ea9c..0785b4307 100644
--- a/src/python/SConscript
+++ b/src/python/SConscript
@@ -36,18 +36,20 @@ Source('swig/pyobject.cc')
PySource('m5', 'm5/__init__.py')
PySource('m5', 'm5/SimObject.py')
-PySource('m5', 'm5/attrdict.py')
PySource('m5', 'm5/convert.py')
PySource('m5', 'm5/event.py')
PySource('m5', 'm5/main.py')
-PySource('m5', 'm5/multidict.py')
PySource('m5', 'm5/params.py')
PySource('m5', 'm5/proxy.py')
PySource('m5', 'm5/simulate.py')
PySource('m5', 'm5/smartdict.py')
PySource('m5', 'm5/stats.py')
PySource('m5', 'm5/ticks.py')
-PySource('m5', 'm5/util.py')
+PySource('m5.util', 'm5/util/__init__.py')
+PySource('m5.util', 'm5/util/attrdict.py')
+PySource('m5.util', 'm5/util/jobfile.py')
+PySource('m5.util', 'm5/util/misc.py')
+PySource('m5.util', 'm5/util/multidict.py')
SwigSource('m5.internal', 'swig/core.i')
SwigSource('m5.internal', 'swig/debug.i')
diff --git a/src/python/m5/SimObject.py b/src/python/m5/SimObject.py
index d1aec44b3..41ed3df9e 100644
--- a/src/python/m5/SimObject.py
+++ b/src/python/m5/SimObject.py
@@ -32,7 +32,6 @@ import sys, types
import proxy
import m5
from util import *
-from multidict import multidict
# These utility functions have to come first because they're
# referenced in params.py... otherwise they won't be defined when we
diff --git a/src/python/m5/main.py b/src/python/m5/main.py
index cbdd65492..5c3324224 100644
--- a/src/python/m5/main.py
+++ b/src/python/m5/main.py
@@ -33,7 +33,7 @@ import os
import socket
import sys
-from attrdict import attrdict
+from util import attrdict
import defines
import traceflags
diff --git a/src/python/m5/util/__init__.py b/src/python/m5/util/__init__.py
new file mode 100644
index 000000000..f82de696a
--- /dev/null
+++ b/src/python/m5/util/__init__.py
@@ -0,0 +1,32 @@
+# Copyright (c) 2008 The Hewlett-Packard Development Company
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Nathan Binkert
+
+from attrdict import attrdict, optiondict
+from misc import *
+from multidict import multidict
+import jobfile
diff --git a/src/python/m5/attrdict.py b/src/python/m5/util/attrdict.py
index 4ee7f1b8c..44479c456 100644
--- a/src/python/m5/attrdict.py
+++ b/src/python/m5/util/attrdict.py
@@ -26,7 +26,7 @@
#
# Authors: Nathan Binkert
-__all__ = [ 'attrdict' ]
+__all__ = [ 'attrdict', 'optiondict' ]
class attrdict(dict):
def __getattr__(self, attr):
@@ -44,6 +44,15 @@ class attrdict(dict):
return self.__delitem__(attr)
return super(attrdict, self).__delattr__(attr, value)
+class optiondict(attrdict):
+ def __getattr__(self, attr):
+ try:
+ return super(optiondict, self).__getattr__(attr)
+ except AttributeError:
+ #d = optionsdict()
+ #setattr(self, attr, d)
+ return None
+
if __name__ == '__main__':
x = attrdict()
x.y = 1
diff --git a/src/python/m5/util/jobfile.py b/src/python/m5/util/jobfile.py
new file mode 100644
index 000000000..5e015c4ad
--- /dev/null
+++ b/src/python/m5/util/jobfile.py
@@ -0,0 +1,450 @@
+# Copyright (c) 2005-2006 The Regents of The University of Michigan
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Nathan Binkert
+
+import sys
+
+from attrdict import attrdict, optiondict
+from misc import crossproduct, flatten
+
+class Data(object):
+ def __init__(self, name, desc, **kwargs):
+ self.name = name
+ self.desc = desc
+ self.__dict__.update(kwargs)
+
+ def update(self, obj):
+ if not isinstance(obj, Data):
+ raise AttributeError, "can only update from Data object"
+
+ for k,v in obj.__dict__.iteritems():
+ if not k.startswith('_'):
+ self.__dict__[k] = v
+ if hasattr(self, 'system') and hasattr(obj, 'system'):
+ if self.system != obj.system:
+ raise AttributeError, \
+ "conflicting values for system: '%s'/'%s'" % \
+ (self.system, obj.system)
+
+ def printinfo(self):
+ if self.name:
+ print 'name: %s' % self.name
+ if self.desc:
+ print 'desc: %s' % self.desc
+ try:
+ if self.system:
+ print 'system: %s' % self.system
+ except AttributeError:
+ pass
+
+ def printverbose(self):
+ for key in self:
+ val = self[key]
+ if isinstance(val, dict):
+ import pprint
+ val = pprint.pformat(val)
+ print '%-20s = %s' % (key, val)
+ print
+
+ def __contains__(self, attr):
+ if attr.startswith('_'):
+ return False
+ return attr in self.__dict__
+
+ def __getitem__(self, key):
+ if key.startswith('_'):
+ raise KeyError, "Key '%s' not found" % attr
+ return self.__dict__[key]
+
+ def __iter__(self):
+ keys = self.__dict__.keys()
+ keys.sort()
+ for key in keys:
+ if not key.startswith('_'):
+ yield key
+
+ def optiondict(self):
+ result = optiondict()
+ for key in self:
+ result[key] = self[key]
+ return result
+
+ def __str__(self):
+ return self.name
+
+class Job(Data):
+ def __init__(self, options):
+ super(Job, self).__init__('', '')
+
+ config = options[0]._config
+ for opt in options:
+ if opt._config != config:
+ raise AttributeError, \
+ "All options are not from the same Configuration"
+
+ self._config = config
+ self._groups = [ opt._group for opt in options ]
+ self._options = options
+
+ self.update(self._config)
+ for group in self._groups:
+ self.update(group)
+
+ self._is_checkpoint = True
+
+ for option in self._options:
+ self.update(option)
+ if not option._group._checkpoint:
+ self._is_checkpoint = False
+
+ if option._suboption:
+ self.update(option._suboption)
+ self._is_checkpoint = False
+
+ names = [ ]
+ for opt in self._options:
+ if opt.name:
+ names.append(opt.name)
+ self.name = ':'.join(names)
+
+ descs = [ ]
+ for opt in self._options:
+ if opt.desc:
+ descs.append(opt.desc)
+ self.desc = ', '.join(descs)
+
+ self._checkpoint = None
+ if not self._is_checkpoint:
+ opts = []
+ for opt in options:
+ cpt = opt._group._checkpoint
+ if not cpt:
+ continue
+ if isinstance(cpt, Option):
+ opt = cpt.clone(suboptions=False)
+ else:
+ opt = opt.clone(suboptions=False)
+
+ opts.append(opt)
+
+ if opts:
+ self._checkpoint = Job(opts)
+
+ def clone(self):
+ return Job(self._options)
+
+ def printinfo(self):
+ super(Job, self).printinfo()
+ if self._checkpoint:
+ print 'checkpoint: %s' % self._checkpoint.name
+ print 'config: %s' % self._config.name
+ print 'groups: %s' % [ g.name for g in self._groups ]
+ print 'options: %s' % [ o.name for o in self._options ]
+ super(Job, self).printverbose()
+
+class SubOption(Data):
+ def __init__(self, name, desc, **kwargs):
+ super(SubOption, self).__init__(name, desc, **kwargs)
+ self._number = None
+
+class Option(Data):
+ def __init__(self, name, desc, **kwargs):
+ super(Option, self).__init__(name, desc, **kwargs)
+ self._suboptions = []
+ self._suboption = None
+ self._number = None
+
+ def __getattribute__(self, attr):
+ if attr == 'name':
+ name = self.__dict__[attr]
+ if self._suboption is not None:
+ name = '%s:%s' % (name, self._suboption.name)
+ return name
+
+ if attr == 'desc':
+ desc = [ self.__dict__[attr] ]
+ if self._suboption is not None and self._suboption.desc:
+ desc.append(self._suboption.desc)
+ return ', '.join(desc)
+
+ return super(Option, self).__getattribute__(attr)
+
+ def suboption(self, name, desc, **kwargs):
+ subo = SubOption(name, desc, **kwargs)
+ subo._config = self._config
+ subo._group = self._group
+ subo._option = self
+ subo._number = len(self._suboptions)
+ self._suboptions.append(subo)
+ return subo
+
+ def clone(self, suboptions=True):
+ option = Option(self.__dict__['name'], self.__dict__['desc'])
+ option.update(self)
+ option._group = self._group
+ option._config = self._config
+ option._number = self._number
+ if suboptions:
+ option._suboptions.extend(self._suboptions)
+ option._suboption = self._suboption
+ return option
+
+ def subopts(self):
+ if not self._suboptions:
+ return [ self ]
+
+ subopts = []
+ for subo in self._suboptions:
+ option = self.clone()
+ option._suboption = subo
+ subopts.append(option)
+
+ return subopts
+
+ def printinfo(self):
+ super(Option, self).printinfo()
+ print 'config: %s' % self._config.name
+ super(Option, self).printverbose()
+
+class Group(Data):
+ def __init__(self, name, desc, **kwargs):
+ super(Group, self).__init__(name, desc, **kwargs)
+ self._options = []
+ self._number = None
+ self._checkpoint = False
+
+ def option(self, name, desc, **kwargs):
+ opt = Option(name, desc, **kwargs)
+ opt._config = self._config
+ opt._group = self
+ opt._number = len(self._options)
+ self._options.append(opt)
+ return opt
+
+ def options(self):
+ return self._options
+
+ def subopts(self):
+ subopts = []
+ for opt in self._options:
+ for subo in opt.subopts():
+ subopts.append(subo)
+ return subopts
+
+ def printinfo(self):
+ super(Group, self).printinfo()
+ print 'config: %s' % self._config.name
+ print 'options: %s' % [ o.name for o in self._options ]
+ super(Group, self).printverbose()
+
+class Configuration(Data):
+ def __init__(self, name, desc, **kwargs):
+ super(Configuration, self).__init__(name, desc, **kwargs)
+ self._groups = []
+ self._posfilters = []
+ self._negfilters = []
+
+ def group(self, name, desc, **kwargs):
+ grp = Group(name, desc, **kwargs)
+ grp._config = self
+ grp._number = len(self._groups)
+ self._groups.append(grp)
+ return grp
+
+ def groups(self):
+ return self._groups
+
+ def checkchildren(self, kids):
+ for kid in kids:
+ if kid._config != self:
+ raise AttributeError, "child from the wrong configuration"
+
+ def sortgroups(self, groups):
+ groups = [ (grp._number, grp) for grp in groups ]
+ groups.sort()
+ return [ grp[1] for grp in groups ]
+
+ def options(self, groups=None, checkpoint=False):
+ if groups is None:
+ groups = self._groups
+ self.checkchildren(groups)
+ groups = self.sortgroups(groups)
+ if checkpoint:
+ groups = [ grp for grp in groups if grp._checkpoint ]
+ optgroups = [ g.options() for g in groups ]
+ else:
+ optgroups = [ g.subopts() for g in groups ]
+ if not optgroups:
+ return
+ for options in crossproduct(optgroups):
+ for opt in options:
+ cpt = opt._group._checkpoint
+ if not isinstance(cpt, bool) and cpt != opt:
+ if checkpoint:
+ break
+ else:
+ yield options
+ else:
+ if checkpoint:
+ yield options
+
+ def addfilter(self, filt, pos=True):
+ import re
+ filt = re.compile(filt)
+ if pos:
+ self._posfilters.append(filt)
+ else:
+ self._negfilters.append(filt)
+
+ def jobfilter(self, job):
+ for filt in self._negfilters:
+ if filt.match(job.name):
+ return False
+
+ if not self._posfilters:
+ return True
+
+ for filt in self._posfilters:
+ if filt.match(job.name):
+ return True
+
+ return False
+
+ def checkpoints(self, groups=None):
+ for options in self.options(groups, True):
+ job = Job(options)
+ if self.jobfilter(job):
+ yield job
+
+ def jobs(self, groups=None):
+ for options in self.options(groups, False):
+ job = Job(options)
+ if self.jobfilter(job):
+ yield job
+
+ def alljobs(self, groups=None):
+ for options in self.options(groups, True):
+ yield Job(options)
+ for options in self.options(groups, False):
+ yield Job(options)
+
+ def find(self, jobname):
+ for job in self.alljobs():
+ if job.name == jobname:
+ return job
+ else:
+ raise AttributeError, "job '%s' not found" % jobname
+
+ def job(self, options):
+ self.checkchildren(options)
+ options = [ (opt._group._number, opt) for opt in options ]
+ options.sort()
+ options = [ opt[1] for opt in options ]
+ job = Job(options)
+ return job
+
+ def printinfo(self):
+ super(Configuration, self).printinfo()
+ print 'groups: %s' % [ g.name for g in self._groups ]
+ super(Configuration, self).printverbose()
+
+def JobFile(jobfile):
+ from os.path import expanduser, isfile, join as joinpath
+ filename = expanduser(jobfile)
+
+ # Can't find filename in the current path, search sys.path
+ if not isfile(filename):
+ for path in sys.path:
+ testname = joinpath(path, filename)
+ if isfile(testname):
+ filename = testname
+ break
+ else:
+ raise AttributeError, \
+ "Could not find file '%s'" % jobfile
+
+ data = {}
+ execfile(filename, data)
+ if 'conf' not in data:
+ raise ImportError, 'cannot import name conf from %s' % jobfile
+ conf = data['conf']
+ import jobfile
+ if not isinstance(conf, Configuration):
+ raise AttributeError, \
+ 'conf in jobfile: %s (%s) is not type %s' % \
+ (jobfile, type(conf), Configuration)
+ return conf
+
+def main(conf=None):
+ import sys
+
+ usage = 'Usage: %s [-b] [-c] [-v] <jobfile>' % sys.argv[0]
+
+ try:
+ import getopt
+ opts, args = getopt.getopt(sys.argv[1:], '-bcv')
+ except getopt.GetoptError:
+ sys.exit(usage)
+
+ both = False
+ checkpoint = False
+ verbose = False
+ for opt,arg in opts:
+ if opt == '-b':
+ both = True
+ checkpoint = True
+ if opt == '-c':
+ checkpoint = True
+ if opt == '-v':
+ verbose = True
+
+ if conf is None:
+ if len(args) != 1:
+ raise AttributeError, usage
+ conf = JobFile(args[0])
+ else:
+ if len(args) != 0:
+ raise AttributeError, usage
+
+ if both:
+ jobs = conf.alljobs()
+ elif checkpoint:
+ jobs = conf.checkpoints()
+ else:
+ jobs = conf.jobs()
+
+ for job in jobs:
+ if verbose:
+ job.printinfo()
+ else:
+ cpt = ''
+ if job._checkpoint:
+ cpt = job._checkpoint.name
+ print job.name, cpt
+
+if __name__ == '__main__':
+ main()
diff --git a/src/python/m5/util.py b/src/python/m5/util/misc.py
index 28b8b1b94..094e3ed9a 100644
--- a/src/python/m5/util.py
+++ b/src/python/m5/util/misc.py
@@ -56,4 +56,32 @@ def applyOrMap(objOrSeq, meth, *args, **kwargs):
else:
return [applyMethod(o, meth, *args, **kwargs) for o in objOrSeq]
+def crossproduct(items):
+ if not isinstance(items, (list, tuple)):
+ raise AttributeError, 'crossproduct works only on sequences'
+ if not items:
+ yield None
+ return
+
+ current = items[0]
+ remainder = items[1:]
+
+ if not hasattr(current, '__iter__'):
+ current = [ current ]
+
+ for item in current:
+ for rem in crossproduct(remainder):
+ data = [ item ]
+ if rem:
+ data += rem
+ yield data
+
+def flatten(items):
+ if not isinstance(items, (list, tuple)):
+ yield items
+ return
+
+ for item in items:
+ for flat in flatten(item):
+ yield flat
diff --git a/src/python/m5/multidict.py b/src/python/m5/util/multidict.py
index b5cd700ef..b5cd700ef 100644
--- a/src/python/m5/multidict.py
+++ b/src/python/m5/util/multidict.py
diff --git a/src/python/m5/util/orderdict.py b/src/python/m5/util/orderdict.py
new file mode 100644
index 000000000..3f755d299
--- /dev/null
+++ b/src/python/m5/util/orderdict.py
@@ -0,0 +1,80 @@
+# Copyright (c) 2005 The Regents of The University of Michigan
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Nathan Binkert
+
+__all__ = [ 'orderdict' ]
+
+class orderdict(dict):
+ def __init__(self, d = {}):
+ self._keys = d.keys()
+ super(orderdict, self).__init__(d)
+
+ def __setitem__(self, key, item):
+ super(orderdict, self).__setitem__(key, item)
+ if not hasattr(self, '_keys'):
+ self._keys = [key,]
+ if key not in self._keys:
+ self._keys.append(key)
+
+ def __delitem__(self, key):
+ super(orderdict, self).__delitem__(key)
+ self._keys.remove(key)
+
+ def clear(self):
+ super(orderdict, self).clear()
+ self._keys = []
+
+ def items(self):
+ for i in self._keys:
+ yield i, self[i]
+
+ def keys(self):
+ return self._keys
+
+ def popitem(self):
+ if len(self._keys) == 0:
+ raise KeyError('dictionary is empty')
+ else:
+ key = self._keys[-1]
+ val = self[key]
+ del self[key]
+ return key, val
+
+ def setdefault(self, key, failobj = None):
+ super(orderdict, self).setdefault(key, failobj)
+ if key not in self._keys:
+ self._keys.append(key)
+
+ def update(self, d):
+ for key in d.keys():
+ if not self.has_key(key):
+ self._keys.append(key)
+ super(orderdict, self).update(d)
+
+ def values(self):
+ for i in self._keys:
+ yield self[i]