def __setitem__(self, index, value):
existing_validator = self._value[index].validator
if isinstance(value, YAML):
new_value = existing_validator(value._chunk)
else:
new_value = existing_validator(YAMLChunk(ruamel_structure(value)))
# First validate against forked document
proposed_chunk = self._chunk.fork()
proposed_chunk.contents[index] = new_value.as_marked_up()
proposed_chunk.strictparsed()[index] = deepcopy(
new_value.as_marked_up())
if self.is_mapping():
updated_value = existing_validator(proposed_chunk.val(index))
updated_value._chunk.make_child_of(self._chunk.val(index))
else:
updated_value = existing_validator(proposed_chunk.index(index))
updated_value._chunk.make_child_of(self._chunk.index(index))
# If validation succeeds, update for real
marked_up = new_value.as_marked_up()
# So that the nicer x: | style of text is used instead of
# x: "text\nacross\nlines"
if isinstance(marked_up, (str, unicode)):
if u"\n" in marked_up:
marked_up = PreservedScalarString(marked_up)
self._chunk.contents[index] = marked_up
self._value[YAML(index) if self.is_mapping() else index] = new_value
def as_document(data, schema=None, label=u"<unicode string>"):
"""
Translate dicts/lists and scalar (string/bool/float/int/etc.) values into a
YAML object which can be dumped out.
"""
if schema is None:
schema = Any()
return schema(YAMLChunk(utils.ruamel_structure(data), label=label))