My lightning talk on a few of the new bits of py2neo 1.6 from the London Graph Café (27 Nov 2013)

1. py2neo 1.6
py2neo 1.6
@technige

2. (py2neo 1.6)-[:IS_BUILT_FOR]->(Neo4j 2.0)
py2neo 1.6
@technige

3. What's new?
●
Cypher transactions
●
Label support
●
Schema index support (but not constraints)
●
Better Unicode support
●
Improved streaming for Cypher and batches
●
Implicit authentication
py2neo 1.6
@technige

4. What else?
●
Neotool shell
●
Gremlin removed (see py2neo-gremlin)
●
Load2neo integration
py2neo 1.6
@technige

5. Cypher Transactions
Server
Client
Session
Transaction
Transaction
Statement
Statement
Statement
Statement
Statement
Statement
py2neo 1.6
execute
commit
rollback
@technige

6. Cypher Transactions
>>> from py2neo import cypher
>>> session = cypher.Session("http://arthur:excalibur@camelot:7474")
>>> tx = session.create_transaction()
>>> tx.append("MERGE (a:Person {name:'Alice'}) RETURN a")
>>> tx.append("MERGE (b:Person {name:'Bob'}) RETURN b")
>>> tx.append("MATCH (a), (b) WHERE a.name = 'Alice' AND b.name = 'Bob' "
"CREATE UNIQUE (a)-[ab:KNOWS]->(b) RETURN ab")
>>> tx.commit()
[[Record(columns=(u'a',), values=(Node('.../node/1'),))],
[Record(columns=(u'b',), values=(Node('.../node/2'),))],
[Record(columns=(u'ab',), values=(Relationship('.../relationship/1'),))]]
py2neo 1.6
@technige

7. Node Labels
Node.add_labels(*labels)
Add one or more labels to this node.
>>> from py2neo import neo4j, node
>>> graph_db = neo4j.GraphDatabaseService()
>>> alice, = graph_db.create(node(name="Alice"))
>>> alice.add_labels("female", "human")
py2neo 1.6
@technige

8. Node Labels
Node.remove_labels(*labels)
Remove one or more labels from this node.
Node.get_labels()
Fetch all labels associated with this node.
GraphDatabaseService.find(label, property_key=None, property_value=None)
Iterate through a set of labelled nodes,
optionally filtering by property key and value.
py2neo 1.6
@technige

9. Neotool Shell
$ neotool shell -U arthur -W excalibur -H camelot
Neotool Shell (py2neo/1.6.1 Python/2.7.3-final-0)
Copyright 2013, Nigel Small
camelot:7474/cypher> MATCH (a) RETURN a LIMIT 3
a
---------------------(1 {"name":"Alice"})
(2 {"name":"Bob"})
(3 {"name":"Carol"})
(3 rows)
py2neo 1.6
@technige

10. https://pypi.python.org/pypi/py2neo
~
https://github.com/nigelsmall/py2neo
py2neo 1.6
@technige