def predicate_object_list(self, predicate_object_list):
for i, (predicate, object_list) in enumerate(predicate_object_list):
if i:
yield ';'
yield self.expression(predicate)
for j, object in enumerate(to_list(object_list)):
if j:
yield ','
yield self.expression(object)
def predicate_object_list(self, predicate_object_list):
for i, (predicate, object_list) in enumerate(predicate_object_list):
if i:
yield ';'
yield self.expression(predicate)
for j, object in enumerate(to_list(object_list)):
if j:
yield ','
yield self.expression(object)
def __init__(self, projection, pattern=None, order_by=None, limit=None,
offset=None):
super(ProjectionSupportingQuery, self).__init__(pattern,
order_by=order_by,
limit=limit,
offset=offset)
if projection != '*':
projection = map(to_variable, to_list(projection))
self.projection = tuple(projection)
def __init__(self,
projection,
pattern=None,
order_by=None,
limit=None,
offset=None):
super(ProjectionSupportingQuery, self).__init__(pattern,
order_by=order_by,
limit=limit,
offset=offset)
if projection != '*':
projection = map(to_variable, to_list(projection))
self.projection = tuple(projection)
def project(self, *terms, **kwargs):
"""
Return a new `Select` with the given terms projected in the SELECT
clause.
Each argument may be a variable or a sequence of variables, and each
variable is converted to a `rdflib.Variable` instance using
`to_variable` (which means variables may also be specified as strings
and `Expression` instances).
If the keyword-only argument `append` is true, the specified variables
will be appended to the current projection instead of replacing it.
"""
append = kwargs.pop('append', False)
projection = append and list(self.projection) or []
for arg in terms:
for variable in map(to_variable, to_list(arg)):
projection.append(variable)
return self._clone(projection=tuple(projection))
def project(self, *terms, **kwargs):
"""
Return a new `Select` with the given terms projected in the SELECT
clause.
Each argument may be a variable or a sequence of variables, and each
variable is converted to a `rdflib.Variable` instance using
`to_variable` (which means variables may also be specified as strings
and `Expression` instances).
If the keyword-only argument `append` is true, the specified variables
will be appended to the current projection instead of replacing it.
"""
append = kwargs.pop('append', False)
projection = append and list(self.projection) or []
for arg in terms:
for variable in map(to_variable, to_list(arg)):
projection.append(variable)
return self._clone(projection=tuple(projection))