def __str__(self):
"""Return the instance's string representation."""
if len(self.data) == 1:
return str(_misc.get_single_iter_elem(self.data))
else:
unsorted_strings = [str(elem) for elem in self.data]
return '({elems})'.format(elems=' U '.join(elem for elem in sorted(unsorted_strings)))
def _process_nodes(nodes):
for node in nodes:
if node.nodeType == node.ELEMENT_NODE:
# attributes and children are sets of Couplets.
attributes = set(_process_attributes(node))
children = set(_process_nodes(
node.childNodes)) # May include text (text_left).
children = children.union(attributes)
if len(children) == 1 and _contains_text_node(children):
# We have a single child that is a text node. Remove one layer of couplets.
yield _mo.Couplet(
left=_util.get_left_cached(node.tagName),
right=_misc.get_single_iter_elem(children).right,
direct_load=True)
else:
yield _mo.Couplet(left=_util.get_left_cached(node.tagName),
right=_mo.Set(children,
direct_load=True),
direct_load=True)
elif node.nodeType == node.TEXT_NODE:
text_node_text = node.data.strip()
if len(text_node_text) > 0:
yield _mo.Couplet(left=text_left,
right=_mo.Atom(
_get_atom_value(text_node_text),
direct_load=True),
direct_load=True)
else:
assert False # Node type not supported.
def _process_nodes(nodes):
for node in nodes:
if node.nodeType == node.ELEMENT_NODE:
# attributes and children are sets of Couplets.
attributes = set(_process_attributes(node))
children = set(_process_nodes(node.childNodes)) # May include text (text_left).
children = children.union(attributes)
if len(children) == 1 and _contains_text_node(children):
# We have a single child that is a text node. Remove one layer of couplets.
yield _mo.Couplet(
left=_util.get_left_cached(node.tagName),
right=_miscellaneous.get_single_iter_elem(children).right,
direct_load=True)
else:
yield _mo.Couplet(
left=_util.get_left_cached(node.tagName),
right=_mo.Set(children, direct_load=True),
direct_load=True)
elif node.nodeType == node.TEXT_NODE:
text_node_text = node.data.strip()
if len(text_node_text) > 0:
yield _mo.Couplet(
left=text_left,
right=_mo.Atom(_get_atom_value(text_node_text), direct_load=True),
direct_load=True)
else:
assert False # Node type not supported.
def __str__(self):
"""Return the instance's string representation."""
if len(self.data) == 1:
return str(_misc.get_single_iter_elem(self.data))
else:
unsorted_strings = [str(elem) for elem in self.data]
return '({elems})'.format(elems=' U '.join(
elem for elem in sorted(unsorted_strings)))
def get_ground_set(self) -> _structure.Structure:
"""Return the :term:`ground set` of the lowest-level algebra of this :class:`Set`."""
if len(self.data) == 0:
return _structure.Structure()
elements_ground_set = _structure.Union(elem.get_ground_set() for elem in self.data)
if len(elements_ground_set.data) == 1:
return _structure.PowerSet(_misc.get_single_iter_elem(elements_ground_set.data))
else:
return _structure.PowerSet(elements_ground_set)
def is_same(self, other: Structure) -> bool:
"""Return ``True`` if ``self`` is structurally equivalent to ``other``.
:param other: Must be an instance of `Structure`.
:return: ``True`` if ``self`` is structurally equivalent to ``other``.
"""
assert isinstance(other, Structure)
if isinstance(other, Union):
return self.data == other.data
else:
if len(self.data) == 1:
# Compare the one element against 'other'.
return _misc.get_single_iter_elem(self.data).is_same(other)
else:
# self is a 'real' union, so the 'other' must also be a union.
return False
def is_same(self, other: Structure) -> bool:
"""Return ``True`` if ``self`` is structurally equivalent to ``other``.
:param other: Must be an instance of `Structure`.
:return: ``True`` if ``self`` is structurally equivalent to ``other``.
"""
assert isinstance(other, Structure)
if isinstance(other, Union):
return self.data == other.data
else:
if len(self.data) == 1:
# Compare the one element against 'other'.
return _misc.get_single_iter_elem(self.data).is_same(other)
else:
# self is a 'real' union, so the 'other' must also be a union.
return False