def evaluate(self, output=None, output_format=RDFFormat.TABLE):
"""
Execute the embedded query against the RDF store.
:param output: A file name, file descriptor or a file-like
object to save the results to
(optional). ``True`` can be used as a synonym
for stdout.
:type output: str|file|int|bool
:param output_format: Serialization format for ``output``.
The default is TABLE.
:type output_format: RDFFormat
:return: An iterator over statements or None (if ``output`` is used)..
:rtype: GraphQueryResult
"""
with output_to(output) as out:
callback = None if output is None else out.write
accept = None if output is None else RDFFormat.mime_type_for_format(
output_format)
response = self.evaluate_generic_query(accept=accept,
callback=callback)
if output is None:
return GraphQueryResult(response)
else:
return None
def evaluate(self, output=None, output_format=RDFFormat.NQUADS):
"""
Execute the embedded query against the RDF store. Return
a graph.
"""
with output_to(output) as out:
callback = None if output is None else out.write
accept = None if output is None else RDFFormat.mime_type_for_format(output_format)
response = self.evaluate_generic_query(accept=accept, callback=callback)
if output is None:
return GraphQueryResult(response)
else:
return None
def evaluate(self,
count=False,
output=None,
output_format=TupleFormat.TABLE):
"""Execute the embedded query against the RDF store.
Return an iterator that produces for each step a tuple of values
(resources and literals) corresponding to the variables or
expressions in a 'select' clause (or its equivalent).
:param count: If ``True`` return the number of result rows
instead of the usual iterator.
:type count: bool
:param output: A file name, file descriptor or a file-like
object to save the results to
(optional). ``True`` can be used as a synonym
for stdout.
:type output: str|file|int|bool
:param output_format: Serialization format for ``output``.
The default is TABLE.
:type output_format: RDFFormat
:return: Either an iterator over results,
an integer (the number of results, if ``count`` is used)
or ``None`` (if ``output`` is used).
:rtype: TupleQueryResult|int
"""
with output_to(output) as out:
callback = None if output is None else out.write
accept = None if output is None else TupleFormat.mime_type_for_format(
output_format)
response = self.evaluate_generic_query(count=count,
accept=accept,
callback=callback)
if count:
return response
if output is not None:
return None
return TupleQueryResult(response['names'], response['values'],
response.get('queryInfo'))
def evaluate(self, count=False, output=None, output_format=TupleFormat.CSV):
"""
Execute the embedded query against the RDF store. Return
an iterator that produces for each step a tuple of values
(resources and literals) corresponding to the variables
or expressions in a 'select' clause (or its equivalent).
"""
with output_to(output) as out:
callback = None if output is None else out.write
accept = None if output is None else TupleFormat.mime_type_for_format(output_format)
response = self.evaluate_generic_query(
count=count, accept=accept, callback=callback)
if count:
return response
if output is not None:
return None
return TupleQueryResult(response['names'], response['values'])
def evaluate(self, count=False, output=None,
output_format=TupleFormat.TABLE):
"""Execute the embedded query against the RDF store.
Return an iterator that produces for each step a tuple of values
(resources and literals) corresponding to the variables or
expressions in a 'select' clause (or its equivalent).
:param count: If ``True`` return the number of result rows
instead of the usual iterator.
:type count: bool
:param output: A file name, file descriptor or a file-like
object to save the results to
(optional). ``True`` can be used as a synonym
for stdout.
:type output: str|file|int|bool
:param output_format: Serialization format for ``output``.
The default is TABLE.
:type output_format: RDFFormat
:return: Either an iterator over results,
an integer (the number of results, if ``count`` is used)
or ``None`` (if ``output`` is used).
:rtype: TupleQueryResult|int
"""
with output_to(output) as out:
callback = None if output is None else out.write
accept = None if output is None else TupleFormat.mime_type_for_format(output_format)
response = self.evaluate_generic_query(
count=count, accept=accept, callback=callback)
if count:
return response
if output is not None:
return None
return TupleQueryResult(response['names'], response['values'])
def evaluate(self, output=None, output_format=RDFFormat.TABLE):
"""
Execute the embedded query against the RDF store.
:param output: A file name, file descriptor or a file-like
object to save the results to
(optional). ``True`` can be used as a synonym
for stdout.
:type output: str|file|int|bool
:param output_format: Serialization format for ``output``.
The default is TABLE.
:type output_format: RDFFormat
:return: An iterator over statements or None (if ``output`` is used)..
:rtype: GraphQueryResult
"""
with output_to(output) as out:
callback = None if output is None else out.write
accept = None if output is None else RDFFormat.mime_type_for_format(output_format)
response = self.evaluate_generic_query(accept=accept, callback=callback)
if output is None:
return GraphQueryResult(response)
else:
return None
def test_output_to_stderr(capfd):
with output_to(2) as f:
f.write(b'test')
out, err = capfd.readouterr()
assert err == 'test'
def test_output_to_true(capfd):
with output_to(True) as f:
f.write(b'test')
out, err = capfd.readouterr()
assert out == 'test'
