Python collections.OrderedDict.values() Examples

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 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 __setitem__(self, index, value):
        """
        Set the value at position i to value.

        You can only do slice assignment to values if you supply a sequence of
        equal length to the slice you are replacing.
        """
        if isinstance(index, types.SliceType):
            keys = self._main._sequence[index]
            if len(keys) != len(value):
                raise ValueError('attempt to assign sequence of size %s '
                    'to slice of size %s' % (len(name), len(keys)))
            # FIXME: efficiency?  Would be better to calculate the indexes
            #   directly from the slice object
            # NOTE: the new keys can collide with existing keys (or even
            #   contain duplicates) - these will overwrite
            for key, val in zip(keys, value):
                self._main[key] = val
        else:
            self._main[self._main._sequence[index]] = value

    ### following methods pinched from UserList and adapted ### 

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 __mul__(self, n): return self._main.values()*n 

def extend(self, other): raise TypeError('Can\'t extend values') 

def __init__(self, init_val=(), strict=True):
        OrderedDict.__init__(self, init_val, strict=strict)
        self._keys = self.keys
        self._values = self.values
        self._items = self.items
        self.keys = Keys(self)
        self.values = Values(self)
        self.items = Items(self)
        self._att_dict = {
            'keys': self.setkeys,
            'items': self.setitems,
            'values': self.setvalues,
        } 

def remove(self, item): raise TypeError('Can\'t remove items from values') 

def __imul__(self, n): raise TypeError('Can\'t multiply values in place') 

def __iadd__(self, other): raise TypeError('Can\'t add in place to values') 

def __delitem__(self, i): raise TypeError('Can\'t delete items from values') 

def __add__(self, other): return self._main.values() + other 

def append(self, item): raise TypeError('Can\'t append items to values') 

def __repr__(self): return repr(self._main.values())

    # FIXME: do we need to check if we are comparing with another ``Values``
    #   object? (like the __cast method of UserList) 

def __call__(self):
        """Pretend to be the values method."""
        return self._main._values() 

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 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 __le__(self, other): return self._main.values() <= other 

def __setattr__(self, name, value):
        """Protect keys, items, and values."""
        if not '_att_dict' in self.__dict__:
            object.__setattr__(self, name, value)
        else:
            try:
                fun = self._att_dict[name]
            except KeyError:
                OrderedDict.__setattr__(self, name, value)
            else:
                fun(value) 

def __init__(self, init_val=(), strict=True):
        OrderedDict.__init__(self, init_val, strict=strict)
        self._keys = self.keys
        self._values = self.values
        self._items = self.items
        self.keys = Keys(self)
        self.values = Values(self)
        self.items = Items(self)
        self._att_dict = {
            'keys': self.setkeys,
            'items': self.setitems,
            'values': self.setvalues,
        } 

def remove(self, item): raise TypeError('Can\'t remove items from values') 

def pop(self, i=-1): raise TypeError('Can\'t pop items from values') 

def insert(self, i, item): raise TypeError('Can\'t insert items into values') 

def append(self, item): raise TypeError('Can\'t append items to values') 

def __imul__(self, n): raise TypeError('Can\'t multiply values in place') 

def __delitem__(self, i): raise TypeError('Can\'t delete items from values') 

def __radd__(self, other): return other + self._main.values()

    ## following methods not implemented for values ## 

def __add__(self, other): return self._main.values() + other 

def __mul__(self, n): return self._main.values()*n 

def sort(self, *args, **kwds):
        """Sort the values."""
        vals = self._main.values()
        vals.sort(*args, **kwds)
        self[:] = vals