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Hello World ODBC

Hello World ODBC#

This notebook walks through basic code examples of integrating xGT with MySQL, pandas, networkx, and jgraph

trovares_connector#

trovares_connector with ODBC can be installed with: python -m pip install 'trovares_connector[odbc]'

Connect#

Connect to xGT and the MySQL database

from trovares_connector import ODBCConnector, SQLODBCDriver
import xgt
import pyodbc

xgt_server = xgt.Connection()
xgt_server.set_default_namespace('odbc')
connection_string = 'Driver={MariaDB};Server=127.0.0.1;Port=3306;Database=test;Uid=test;Pwd=foo;'
odbc_driver = SQLODBCDriver(connection_string)
c = ODBCConnector(xgt_server, odbc_driver)
pyodbc_driver = pyodbc.connect(connection_string)
cursor = pyodbc_driver.cursor()

Create a graph in MySQL#

cursor.execute("DROP TABLE IF EXISTS Knows")
cursor.execute("DROP TABLE IF EXISTS Person")
pyodbc_driver.commit()
names = ["Nicole", "Nathan", "Bishop", "Ashley", "Joe"]
cursor.execute('CREATE TABLE Person (id INT, name varchar(255))')                 
cursor.execute('CREATE TABLE Knows (Person1 INT, Person2 INT)')
cursor.execute(f'INSERT INTO Person VALUES (0, \'{names[0]}\')')                
for i in range(0, len(names) - 1):                                      
    cursor.execute(f'INSERT INTO Person VALUES ({i + 1}, \'{names[i + 1]}\')')     
    cursor.execute(f'INSERT INTO Knows VALUES ({i}, {i + 1})') 
cursor.execute('INSERT INTO Knows VALUES (2, 0)')              
pyodbc_driver.commit()

Transfer data to xGT#

Transfers data associated with edge, Knows, including the associated vertices

c.transfer_to_xgt(tables=[('Person', ('id',)), ('Knows', ('Person', 'Person', 'Person1', 'Person2'))])

Transferring: [############################################################] 10/10 in 0:00:00.0s (516.3/s, eta: 0:00:00.0s)

Cypher#

Retrieve python query results

query = "match(a)-->()-->()-->(a) return a.name"

job = xgt_server.run_job(query)
print("xGT found the following relationship triangle: " + ', '.join(str(row[0]) for row in job.get_data()))

xGT found the following relationship triangle: Bishop, Nathan, Nicole

Save results to disk#

query = "match(a)-->()-->()-->(a) return a.name into results"

xgt_server.run_job(query)
xgt_server.get_frame("results").save("results.csv")
xgt_server.drop_frame("results")

True

Pandas DataFrames#

Convert results into a pandas dataframe

job.get_data_pandas()
a_name
0 Bishop
1 Nathan
2 Nicole

NetworkX#

Getting data into networkx

import networkx as nx

edge_data = [tuple(x) for x in xgt_server.get_frame("Knows").get_data()]
vertex_data = xgt_server.get_frame("Person").get_data()

dg = nx.DiGraph()

dg.add_edges_from(edge_data)
nx.set_node_attributes(dg, {row[0]:row[1] for row in vertex_data}, name="name")

nx.draw_networkx(dg, font_color='white')
../../_images/c73ee4e53e49e2a6adbafa2759015d0b6f18c4249decb772f54f45998d8d4c03.png 
dg.nodes(data=True)

NodeDataView({0: {'name': 'Nicole'}, 1: {'name': 'Nathan'}, 2: {'name': 'Bishop'}, 3: {'name': 'Ashley'}, 4: {'name': 'Joe'}})

nx.degree(dg)

DiDegreeView({0: 2, 1: 2, 2: 3, 3: 2, 4: 1})

jgraph#

Visualizing the graph with jgraph

import jgraph

data =  xgt_server.run_job("match(a)-->(b) return a.id, b.id").get_data()
data = [tuple(x) for x in data]
jgraph.draw(data)
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