neo4j

from py2neo import Graph, Node, Relationship
g = Graph()
tx = g.begin()
a = Node("Person", name="Alice")
tx.create(a)
b = Node("Person", name="Bob")
ab = Relationship(a, "KNOWS", b)
tx.create(ab)
tx.commit()
g.exists(ab)

# match
MATCH (tom:Person {name: 'Tom Hanks'})
RETURN tom

# Find which `Movie`s Tom Hanks has directed.
MATCH (:Person {name: 'Tom Hanks'})-[:DIRECTED]->(movie:Movie)
RETURN movie


# Find which Movie Tom Hanks has directed, but this time, return only the title of the movie.
MATCH (:Person {name: 'Tom Hanks'})-[:DIRECTED]->(movie:Movie)
RETURN movie.title

# create direction
CREATE (p:Person)-[:LIKES]->(t:Technology)

# update direction
MATCH (jennifer:Person {name: 'Jennifer'})
MATCH (mark:Person {name: 'Mark'})
CREATE (jennifer)-[rel:IS_FRIENDS_WITH]->(mark)

# checo direction
MATCH (:Person {name: 'Jennifer'})-[rel:WORKS_FOR]-(:Company {name: 'Neo4j'})