pylearn: lookup_list.py annotate

annotate lookup_list.py @ 19:57f4015e2e09

Iterators extend LookupList

author	bergstrj@iro.umontreal.ca
date	Thu, 27 Mar 2008 01:59:44 -0400
parents	759d17112b23
children	266c68cb6136

rev	line source
12 ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	1
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	2 class LookupList(object):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	3 """
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	4 A LookupList is a sequence whose elements can be named (and unlike
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	5 a dictionary the order of the elements depends not on their key but
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	6 on the order given by the user through construction) so that
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	7 following syntactic constructions work as one would expect:
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	8 example = Example(['x','y','z'],[1,2,3])
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	9 example.x = [1, 2, 3] # set or change a field
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	10 x, y, z = example
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	11 x = example[0]
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	12 x = example["x"]
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	13 print example.keys() # returns ['x','y','z']
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	14 print example.values() # returns [[1,2,3],2,3]
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	15 """
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	16 def __init__(self,names=[],values=[]):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	17 assert len(values)==len(names)
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	18 self.__dict__['_values']=values
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	19 self.__dict__['_name2index']={}
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	20 self.__dict__['_names']=names
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	21 for i in xrange(len(values)):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	22 self._name2index[names[i]]=i
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	23
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	24 def keys(self):
17 759d17112b23 more comments, looping ArrayDataSet iterator, bugfixes to lookup_list, more tests bergstrj@iro.umontreal.ca parents: 12 diff changeset	25 return self._names
12 ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	26
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	27 def values(self):
17 759d17112b23 more comments, looping ArrayDataSet iterator, bugfixes to lookup_list, more tests bergstrj@iro.umontreal.ca parents: 12 diff changeset	28 return self._values
12 ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	29
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	30 def items(self):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	31 return zip(self._names,self._values)
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	32
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	33 def __getitem__(self,key):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	34 """
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	35 The key in example[key] can either be an integer to index the fields
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	36 or the name of the field.
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	37 """
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	38 if isinstance(key,int):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	39 return self._values[key]
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	40 else: # if not an int, key must be a name
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	41 return self._values[self._name2index[key]]
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	42
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	43 def __setitem__(self,key,value):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	44 if isinstance(key,int):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	45 self._values[key]=value
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	46 else: # if not an int, key must be a name
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	47 if key in self._name2index:
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	48 self._values[self._name2index[key]]=value
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	49 else:
19 57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	50 raise KeyError(key)
12 ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	51
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	52 def __getattr__(self,name):
19 57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	53 try:
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	54 return self._values[self._name2index[name]]
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	55 except KeyError, e:
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	56 raise AttributeError(name)
12 ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	57
19 57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	58 if 0:
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	59 # This makes subclassing horrible, just call append_keyval if it's
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	60 # really what you want to do.
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	61 # -JB
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	62 def __setattr__(self,name,value):
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	63 if name in self._name2index:
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	64 self._values[self._name2index[name]]=value
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	65 else:
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	66 raise AttributeError(name)
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	67
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	68 def append_keyval(self, key, value):
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	69 self._name2index[key]=len(self)
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	70 self._values.append(value)
57f4015e2e09 Iterators extend LookupList bergstrj@iro.umontreal.ca parents: 17 diff changeset	71 self._names.append(key)
12 ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	72
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	73 def __len__(self):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	74 return len(self._values)
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	75
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	76 def __repr__(self):
ff4e551490f1 Added LookupList type in lookup_list.py and used it to keep order bengioy@esprit.iro.umontreal.ca parents: diff changeset	77 return "{%s}" % ", ".join([str(k) + "=" + repr(v) for k,v in self.items()])

Mercurial > pylearn

annotate lookup_list.py @ 19:57f4015e2e09