Agraph-python

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Allow sparql queries inside a Jupyter notebook
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Also
Allow "root" to denote the root catalog
Update some module versions
Fix the specification of a protocol when creating a
connection.

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rfe16555: Add support for handling 204 responses from AG
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The AllegroGraph server, starting in vesion 7.1.0, may return
a 204 (no content) response when it knows that it will not
be returning any data. The client will
then create a null cursor, rather than creating an http
cursor which when used immediately returns 'no data left'

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rfe16523: query options API
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``RepositoryConnection`` class now provides a set of methods for
managing per-user/per-repository SPARQL query options. The methods
utilize a server-side API that is available in AllegroGraph v7.1.0 and
later and are similar to the namespace management methods:

- ``getQueryOptions()``
- ``getQueryOption()``
- ``setQueryOption()``
- ``removeQueryOption()``
- ``clearQueryOptions()``

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Fix bug in URI's split function
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split() was splitting on the wrong character.
Fix submitted via github.

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Dependency updates
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Package Previous version New version
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rfe16393: Let SPARQL SELECT queries return metadata
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Extend `TupleQueryResult` with a field named `metadata` that contains
the query execution properties, like time spent and memory used:

>>> from franz.openrdf.query.query import QueryLanguage
>>> query = conn.prepareTupleQuery(QueryLanguage.SPARQL, "SELECT * { ?s ?p ?o }")
>>> result = query.evaluate()
>>> queryDuration = result.metadata['time']['total']

For now this is only supported on `SELECT` queries.

Security-related dependency updates
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Package Previous version New version
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``numpy`` ``1.15.1``/``1.15.4`` ``1.16.0``