def __setitem__(self, index, value):
if isinstance(index, slice):
s = clean_slice(index, self.count, replace_none=True, allow_step=(1,))
indices = iter(xrange(s.start, s.stop, s.step))
values = iter(value)
enum = izip(indices, values)
extended = False
for i, val in enum:
found = self._update_item(i, val)
if not found:
extended = True
self._create_item(i, val)
for i, val in enum:
self._create_item(i, val)
try:
# are there more indices than values?
i = indices.next()
if not extended:
del self[i:s.stop]
except StopIteration:
# no more indices, then there might be more values
val_list = list(values)
if val_list and not extended:
self._shift_gte(s.stop, len(val_list))
for i, val in enumerate(val_list):
self._create_item(s.stop + i, val)
else:
found = self._update_item(index, value)
if not found:
raise IndexError("assignment index out of range")
def __delitem__(self, index):
if isinstance(index, slice):
s = clean_slice(index, self.count, allow_step=(1,))
items = self._slice(s)
count = items.count()
items.delete()
if s.stop is not None:
self._shift_gte(s.stop, -count)
else:
try:
self.pop(index)
except self.model.DoesNotExist:
raise IndexError("assignment index out of range")
def _do_slice(self, s, target, lookup, filters=None):
if not filters:
filters = {}
s = clean_slice(s, self.count, allow_step=(1, -1))
if s.start and s.stop is not None:
filters["%s__range" % lookup] = (s.start, s.stop - 1)
elif s.start:
filters["%s__gte" % lookup] = s.start
elif s.stop is not None:
filters["%s__lt" % lookup] = s.stop
qs = target.filter(**filters)
if s.step == -1:
qs = qs.reverse()
return qs
